why are silver proof eagles vary in price ie, 1992 $104 while 1991 is $31 is it simply scarcity?

November 11, 2009 · Posted in Silver Eagle Proof Questions · 4 Comments 

Silver Eagle Proof Coins Ending Soon on eBay:
2012 AMERICAN EAGLE - 1 OZ. SILVER - PROOF - READY TO SHIP!!

US $74.95 (0 Bid)
End Date: Saturday May-19-2012 4:45:07 PDT
Buy It Now for only: US $89.95
Bid now | Buy it now | Add to watch list

Powered by Yahoo! Answers