Some recent bunn coffee drip trays auctions on eBay:

BUNN-O-Matic 06465.0000 - Drip Tray For SRU Coffee Urns

US $165.66
End Date: Monday May-21-2012 0:55:17 PDT
Buy It Now for only: US $165.66
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BUNN-O-Matic 07284.0000 - Drip Tray Kit for U3 Coffee Urn
US $340.50
End Date: Monday May-21-2012 1:49:16 PDT
Buy It Now for only: US $340.50
Buy it now | Add to watch list