I got a Hexanon AR 40/1.8 for seven bucks recently that was rated UG. Couple specks of internal dust and missing inspection sticker was all. Also in the same shipment: TC-X body for $10 (meter dead) and AR-TC body for $1.49 (meter dead, foam bad) -- both as advertised, although the AR-TC has shrinking leatherette too (common and expected).
But the kicker was the Pentax ME Super SE for $1.49. Listed as advance inop. Arrived working fine, if not much of a looker. Even counting shipping (per item), the two LR44 batteries cost more than the camera. Can't beat it.