American Eagle Silver Proofs at a discount/or in bulk?

Does anyone know where you can buy American Eagle Silver Proofs at a discount/or in bulk? I see them on Ebay with starting bids of $8 and I have been trying to figure out where they get them so cheaply.

Thanks!

Silver Eagle Proof Coins Ending Soon on eBay:
1989 S Proof Silver Eagle NGC PF69 Ultra Cameo

US $92.00 End Date: Tuesday May-22-2012 5:15:30 PDT Buy It Now for only: US $92.00 Buy it now | Add to watch list

• eBay Ending Soon:

  2012-W Proof American Silver Eagle $1 NGC PF70 PF-70 Ultra Cameo Early Releases $109.00 28d 16h 22m

  2006-P 20TH ANNIVERSARY REVERSE PROOF SILVER EAGLE NGC PF69-BLACK LABEL BEAUTY! $217.50 21h 26m

  ★ 2006-P NGC REVERSE PROOF PF69 AMERICAN SILVER EAGLE U.S. COINS ★ $173.50 23h 19m

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