500 for $39.00 Thats $0.08 per mailer.

also:
6000 for $390.00 = $0.06 1/2 cents per mailer

Heres the link. This auction is ended but you can see his other auctions.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2955452114&ssPageName=MERC_VIClosedLoser