Price to offer?

[2fast55]

I found a second blazer that has all (maybe, it definitely has most) of the parts I need to get mine done. It supposedly ran when it was parked, and I could probably drive it home with a battery and fresh gas. I need opinions on what I should offer the current owners to bring it home. A little about it: Ochre with Black double wall top. Rust in the drivers side rocker and in lower quarters behind both doors. 350/350/205 with 3.08 open diffs. No lift, tires still hold air, but unknown age. Complete black interior, but with tears in front seats and the rear panels are in poor shape. Has spare mount behind rear seat. All door/top hardware is there. The only thing I noticed missing was the rear hatch handle. Also has an old upright style (8274?) winch mounted in front of the bumper. Sorry, no pics, I spotted this thing peeking out of a barn while I was at work.