Coinbuf

Well lets start with some ground rules, as you are admittingly a beginner it is very unlikely that you are qualified to grade coins in the uber gem MS67 and above grades the same as a TPG grader.   I am not saying that to be mean or dump on your grading skills, but it is just true that it takes years and looking at tens of thousands of coins to learn to grade like a TPG grader.    It is just not as simple as two marks = MS68 and three marks = MS67, there is a lot more to grading than how many marks a coin has on it.   Just because you think your 82-D zinc matches or would grade as MS67RD using the photograde feature on the PCGS website, that does not mean that anyone will agree with your grade assessment.    So, you might think it's an MS67 but ten other people (including TPG graders) might grade it as MS66 or lower due to many factors other than just how many marks you can count on the coin surface.   The severity of the marks, the placement of the marks, these and many other factors determine the grade, and those will not always weigh the same from person to person.
Grading is highly subjective, especially so as the grades get closer to the top grades; and then you add in the human element.   Professional graders often do not agree with each other on some coins.   Grading is not a mathematical equation, and grades can (and there are many well documented cases of such) and do change over time depending on who is doing the grading at any point in time.
As I type this reply there is a thread on another forum about a Kennedy half dollar that was sold in Jan as an MS66, it was just resold this month with a new grade of MS67+, same coin just a new grade and a very drastic change in value.   And this type of thing happens quite often; here is a screen shot of the coin in question.

So as you can see from this one example even professional graders do not always agree on a grade, this coin received a full point and a half grade bump (which incidentally I do not agree with) since the first auction in Jan.    So it's no surprise that you will receive different grade and value estimates on any raw coin that you ask about.    This is especially true with modern coins like your 82-d where a point change (sometimes even only a half a point) in grade can make a big difference in value.
And we have only begun to scratch the surface here, going back to your 82-d coin, remember that when you post a coin and ask for grade/value assessments, the people that reply are not grading the coin, they are grading your photo.   Photos have limitations and even the very best photos may not fully represent what the coin looks like when viewed by the human eye in hand.
Another issue when you ask questions on the internet is that you have no idea of the experience level of those who reply.   Some may know a great deal more than you, but it is just as likely that some who reply may know squat.   Here again is just another reason why your grade may differ from everyone else, I could go on for days but hopefully what I have written can help you to understand that grading is a very complex and nuanced action.

It would if it was, but it's not so it doesn't.

Not sure if this really falls into the token category but what the heck.   This was in my aunt estate, I'm sure it belonged to my grandmother.   My grandparents owned and operated a trading post/store on the Navajo reservation for 50 years. 
Sorry for the less than great cell phone pics.

Scammer Alert!

Garbage coin not worth the metal it is made of.   To anyone that is new to coins, this poster has a habit of posting incorrect claims and asking outrageous sums of moneys for worthless junk, steer clear of his listings is my advice.

Please do not start or post the same questions in multiple threads, that just gets very confusing for everyone.   As I replied in the other thread that you quoted me, yes this is a common copper small date minted in Philly where millions were minted.   I see no signs of any type of doubling.

Both Greenstang and Icutler are correct, @Baby Jolynnyour coin is just damaged there are no mint errors as was erroneously posted above.   If you like it there is no reason you cannot keep it, but it has no value over the face value of 25 cents.

Both Greenstang and Icutler are correct, @Baby Jolynnyour coin is just damaged there are no mint errors as was erroneously posted above.   If you like it there is no reason you cannot keep it, but it has no value over the face value of 25 cents.

Both Greenstang and Icutler are correct, @Baby Jolynnyour coin is just damaged there are no mint errors as was erroneously posted above.   If you like it there is no reason you cannot keep it, but it has no value over the face value of 25 cents.

That’s all damage, at least some of it from heat.

The coin appears to have been struck through a large amount of grease. Although technically an error its really just a quality control issue for the mint. When grease gets on the dies it can cause the details to be distorted, mushy and wavy just like the coin above shows. It's not worth a lot of money and is actually quite common. Some collectors like these as an example of a struck through grease coin. Cheers!

I see die deterioration doubling just one of the many worthless types of mechanical doubling, this type of doubling is interesting and trips up many collectors.   There is another thread with even more dramatic looking die deterioration here in the forum that a member has spent considerable money on grading fees to find it is just money gone.

Not a double die just some strike doubling, it is common on the zinc core copper coated coins to see this ghostly looking secondary image under high magnification.   This is a small date, but it has all the hallmarks of a zinc core copper plated coin, photos of the full obv are needed, are you sure about that weight, perhaps mixed it up with another coin?   The almost missing initials of the rev is likely from overpolishing of the die, difficult to say for sure without a full shot of the rev.   Please in the future we need full cropped in focus photos of both sides, there are other markers on the coin that are needed for us to help you.

Just a point to help you understand how important the full photos are.   Notice the silver area around the bottom of the mintmark, that is the zinc core showing because the copper plating split at the time the coin was minted.   This is called split plating as greenstang mentioned in his post.   That would automatically tell us that the coin could only be a zinc core copper plated coin, but in your closeup that does not appear silver so it was not possible to confirm without the full obv photos.
Mistakes happen as long as you are having fun its all good, but please keep in mind that so far there are only 2 (or is it three I forget) examples of copper 1982-D small date cents found.    Regardless of what you may have read on the internet the chances of finding one are not in your favor, I have been collecting coins for 40+ years specializing in Lincoln cents and I don't have a scale and have never weighed a coin in my life.

Congrats on your newps!

I'll have what he's having!

Is it graded as AU details?   Because I cannot see why NGC would give a coin with this much damage a straight AU grade.   There is no die doubling on this coin, just some extreme strike doubling.

Just a point to help you understand how important the full photos are.   Notice the silver area around the bottom of the mintmark, that is the zinc core showing because the copper plating split at the time the coin was minted.   This is called split plating as greenstang mentioned in his post.   That would automatically tell us that the coin could only be a zinc core copper plated coin, but in your closeup that does not appear silver so it was not possible to confirm without the full obv photos.
Mistakes happen as long as you are having fun its all good, but please keep in mind that so far there are only 2 (or is it three I forget) examples of copper 1982-D small date cents found.    Regardless of what you may have read on the internet the chances of finding one are not in your favor, I have been collecting coins for 40+ years specializing in Lincoln cents and I don't have a scale and have never weighed a coin in my life.

Not a double die just some strike doubling, it is common on the zinc core copper coated coins to see this ghostly looking secondary image under high magnification.   This is a small date, but it has all the hallmarks of a zinc core copper plated coin, photos of the full obv are needed, are you sure about that weight, perhaps mixed it up with another coin?   The almost missing initials of the rev is likely from overpolishing of the die, difficult to say for sure without a full shot of the rev.   Please in the future we need full cropped in focus photos of both sides, there are other markers on the coin that are needed for us to help you.

#1.  Wrong forum. This board is for listing coins for sale, has rules for those listings, and your post does not comply with any of them.
 
#2.  I see a circulated Lincoln with dirty water stains.  Nothing more or less. 

I forgot to add, you coin appears to have a "P" mintmark indicating it was struck at the Philly mint.  

Very PL in hand, tough to get that look with the photo.

A finalized and reviewed version of my research is slated to appear as the cover story in November's issue of The Numismatist. I think a few members here will enjoy the read.