WHAT Are The Current Rates per coin, or Coin Sets, for grading, on average, for the newbies?

I was looking for a Newbie Guide first off, so I would not bother you at SGC, hoping to find rates per coin average. Since I have 20 Silver Eagles, and Some other annual Proof sets to be encased and graded, Yet found no rates per coin, or number of coins. FOr Example the 2006 anniversary set eagle silver dollars, and many other sets. The sets should be mailed as they arrived from the mint, or as I have recieved them years ago in the cases from the mint. Anyway, I read single submissions, but as in an anniversay set, there is 3 coins in one box, so I want to send in at least 10 to 20 eagles for grading. I just do not see what the rates are anywhere.