Tell him your sorry, he misunderstood you. You only wanted to buy the Cab not the whole truck!
Two thoughts -
1) You can buy a whole non-working truck for $2,000-3500. Why spend 2k on just his cab???
2) He thinks he can get $200 a seat, $100 for the stearing column, $200 for the dash, $200 a door, $200 for the A/C, etc., etc. He wants to be a junk yard company, not a guy trying to get rid of something. But that is a royal PITA to do. Lets face it FB, CL, and Offer Uppers are 80% flakes. So it is painful to answer to 500 buyers only to have 100 ever show up to then what make $3-4K. So you can say something like, you really want to part out a cab and deal with all those flakes saying the want it and never showing up????
I think you offer him what you want, but I would only go as high as say $1,000 if the whole cab was pristine inside and out and I really wanted to upgrade. The real money is in the engine, transmission, transfer case, radiator, axles, bed, and parts like VRV's, coolant tanks, ABS parts, Fuel transer switches and a host of other discontinued and hard to source parts. Not dashboards and doors. So plenty of meat still on the bone for him to make some money.
