Totally depends on how long it is. I bought a bunch of SOOW 8/4 cord a guy was selling on Craigslist (cord was new material but in two pieces, one about 38 ft and one about 45 ft) and I gave him $75 for it.
Totally depends on length, condition (clean, dirty, nicks, crushed spots, etc).
EDIT: Now I opened the pic and see its 60 ft. The ends are worth about nothing, and I see a nick or abraded spot on it....................... I would not go much over $50........ assuming he measured it correctly.
I put L14-30 twist lock type ends on mine and made them extension cords for my generator, and with adapters, they make good RV extension cord also, or welder extensions.
Charles