hmm I see a lot of hidden rust. The lower quarters , wheel well arches, right in front of the arch in the seam. the front lower corner of the drivers door. the lower front fender dog-leg. what I saw of the trunk looks ok but the tire well could be bad but otherwise not too shabby. if the cowl and frame rails check ok. take battery out and look to see of there is rust in and below the tray on the frame rails there,rust in the drivers door jamb. Check the fresh air boxes and see if you can see any rust in the cowl,if he'll let you spray water in the wiper/cowl area and see if it's leaking. Cowl work is pretty much a deal breaker but it can be fixed also with a lot of work, (I did mine). top is about due for replacement due to shrinkage(above the door glass it's pulling up even with the tension springs trying to hold it down) probably another year or so, possible heater core leak too. I'd go not much higher than 2k "maybe" 2200 due to the issues I see. that is on the high side since it is a driver and it's all there Just my opinion though.
