The driver's door is obviously done, and the front lip needs paint.
I would be very careful of this engine. He either spills a lot of oil, or has a PCV problem-which means it could have other problems inside.
Personally, I think this was a good offer up to $10k. He hasn't taken care of it well, but it seems fixable and worth the investment if you put time and money into it.
I bought mine of eBay in June. First thing I did is an engine rebuild-I also got fucked with frame damage I didnt see, bad rear shocks and a bunch of little shit-so make sure you have money left over (and willing to put more than purchase price into it).
If he relists, I would ask him for pictures of the undercarriage to make sure you dont get a banged up frame, ask him what happened to the door, and do a compression check on pick-up.
Jake