I have a pretty limited Off With Their Heads: "Fine Tuning the Bender" self-released 7" (with included note from the band) on eBay right now. Current bidding is in the low $20s with about two days left. Two bidders, but 10 watchers.
These were limited to, to my knowledge, 100 copies and sent to zines/promoters in the midwest when the band was still fairly obscure. I ran a zine that received a copy, so I'm the original owner.
For those interested, I'm also selling some rare early non-vinyl releases from The Swellers:
End of Discussion (self-released debut album)
Demonstration Disc (CD-R demo issued by the band during its first shows)
I also have a surplus of the band's first label release, The Beginning of the End Again, being sold storefront-style for $2 apiece.