That's a tough sell.. no question it's a fair deal, but only for someone who really wants/needs exactly those tires, today. Did you go up in size or something?
for me personally, I could use one 285 as a spare, but I'd be happy with a 2yo used one for $50. I know these are better than that..
82 fj40, 99 uzj100, 06 gx470
97 DR650, 05 525EXC, 06 TW200, 89 TW200, 09 TTR125, 07 TTR90, 07 CRF50