Rust free it would be listed for about $4500 out here in CA. If it is clean and rust free, $3k would be a good price considering out here in CA it would be closer to $5k. I would think $2500 is a good place to start seeing how he is only asking $3300.

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed