In mint condition, I might go $250. It would have to be pristine.
They aren't a horrible rig, but they certainly aren't much better than just good. They were entry level 20yrs ago and technology has totally passed them by with the new entry level rigs like the
FT-450 or the older
IC-718.
I got a
TS-680 (
TS-140) in like new condition for $200 about ten years ago. I think the receiver on those is better than the 757. I've had more than one 757 over the years too.