Greenstang

Looks like damage  (PMD) but please show a full photo of both sides so we can get a better perspective.  
This should always be done with any posting.
Thanks for the full photos. They confirm that this is just damage.  
It could not look like that after it was struck at the mint.

The most asked question on any coin forum.   
It is a Large Date.

The most asked question on any coin forum.   
It is a Large Date.

That looks like die deterioration doubling and possibly split plating on the mint mark.  
but waiting for full photos of both sides of the coin before making a decision.

If you are thinking that it is a copper 1943 cent, more info is required.
What is the weight to two decimal points.  
Does it stick to a magnet.
Answer those and we will take it from there.

That looks like die deterioration doubling and possibly split plating on the mint mark.  
but waiting for full photos of both sides of the coin before making a decision.

Welcome to the Chat Board
Please start a new thread for each coin. It causes confusion with more than one coin per post.
To answer your  question, the mint marks were hand punched so it could be anywhere below the date    
and right  of the bust to be acceptable. In theory if there were 20 dies produced, the mint mark could be
in a slightly different position on each one plus they were not always punched straight.

Reading metal composition is not always the answer to detecting counterfeits. 
There are many counterfeits out there that are the same composition as a genuine
coin. Plus a lot of of the equipment out there only read the surface so if a coin is silver    
or gold plated, it will still read as silver or gold. You would be better off with a good set
of scales that read to at least two decimal points to compare weights. Even this does
not eliminate all counterfeits but will eliminate some. For me personally I find the best way    
is to do a side by side photo comparison of the coin in question and a genuine one looking
for slight differences in the design. I always start with the date as this seems to be an area
that counterfeiters have the most trouble with.

Looks like environmental corrosion, possibly from being buried.
In the future, please show both sides and crop and rotate your photos. We don’t need all of that background. Don’t know why so many Newbies post photos upside down or sideways, they wouldn’t hang a picture on the wall that way.

Even without the misspelled edge lettering, I would say it is a counterfeit.

Why not put this post I’m the “Ask NGC/NCS” forum. 
Someone there would be more capable of answering your question.

First of all if you are going to weigh coins, a scale to at least two decimal points is required.   
One decimal point is not accurate enough. The +- variation for that copper cent is 1.13g.  
which would bring the minimum weight to 2.98g. The rest could probably be attributed to
wear and corrosion

With those 5 dings on the Obverse, I think that would bring it down to a MS 65
 

That is common Machine Doubling, one of the worthless types of doubling.

Ifyou are going to compare coins, you have to compare the same year.  
Dies and mint mark styles can change from year to year,

Doesn’t look like any of the three known RPM’s for a1984D.   
Possibly a plating blister which is common but hard to tell with the reflection on the photo.

The seller says “no returns” so I doubt if they would voluntarily refund the money.   
Will probably have to go through eBay or PayPal.

Welcome to the Chat Board.  
This is the forum for buying/ selling coins.
You should really have posted in the Newbie or Ancient Coins forums, I have asked a moderator to move it.

That is a 18 Groschen from the State of Brandenburg.   
That  is Frederic III who ruled from 1688-1701. It is probably worth $25.00-30.00.
 

It is a counterfeit. It is showing a 1879 reverse.  Where did you get it ?
Also do NOT hold coins in your hand like that. If it was genuine you could get oil
from your skin on it which could cause marks.

The numbers #61 & #86 are probably a dealers stock number
DDR means Doubled Die Reverse, a variety.  See doubleddie.com or varietyvista    
to see which variety yours is.
Struck Through is an error caused by something on the die ( grease, grit, cloth etc.).  
that makes an impression on the planchet when it is struck.

It is a counterfeit. It is showing a 1879 reverse.  Where did you get it ?
Also do NOT hold coins in your hand like that. If it was genuine you could get oil
from your skin on it which could cause marks.

If it is worth more than 1 cent, it’s not by much.  
Just one of over 887 million minted that year beside the fact that it shows damage.
In the future always show both sides of the coin and crop your pictures.

Just something on the coin, whatever it is, it didn’t happen when the cent was struck.
Also as Coinbuf no red, do NOT use screen shots, they are too pixilated to see small detail.

Yes, it is worth the 2 1/2/cents in copper.With over 4 BILLION produced, they are certainly not rare.
 

If you are selling these coins, please follow the instructions in the Coin Marketplace Guidelines thread.  
You have supplied no information whatsoever.