Dont know if they are rare, but I know these are hard to get a hand on:
Todd Francis Eyepatch, with original case and bag.
Propaganda Hijinx, I lost one of the lenses on a trip to Egypt once, so I have put in new pair of Polarized Blk. Irid. Lenses.
Flying Tigers GasCan. I was hit by a rock when I wore the glasses in a car, and I put my head out the window, so the left lens is "scratched". So I put in a pair of engraved Emerald Irid. Lenses (custom program)
Ducati Sq. Wire. I was stupid enough to lend out this pair to a friend who was going on a vacation to the States, and all his baggage got stolen, including this beauty. :-(
-Ostermann