Wow...I had one of those shirts - it was given to me (probably by Roy?) looooooooong before I even looked at that other site. I think I might have just donated it as a matter of fact...
RW, I see NO problem with you posting the link here (especially with Tammy's blessing) - you never know who's lurking that might jump on it. And why shouldn't you and Dread get your investment back, maybe (heaven forbid!) make a few shekels in the process?
I like the Facebook posting suggestion, I think you'll get some bites. You might even want to hit up some folks that still visit that site to drop a post there - from what I understand the "groupie" situation on that site is such that you might very well sell them out.
Good luck with the move and I hope you unload those things successfully!