Line 6 Filter Pro

Rack mount effects unit offering tempo-controlled filters.
[product info (discontinued) | more info]

Placed on the Pumpkins' official eBay account on 2011/09/29, ending on 2011/10/09 at $255 (reserve not met). The item was re-listed again on 2011/10/19, ending this time at only $172.50 (again, reserve not met). A third listing on 2012/12/08 ended on 12/17 at only $112.50. The accompanying text read:

Line 6 Filter Pro Rackmount Studio Modeler. Used by Billy Corgan. The unit has been kept in a smoke-free studio environment. No cables or manuals are included. A certificate of authenticity will be included. Unit is sold "as is".