Its a M/T, thats the infamous jumbo 5000 "shift knob". If you could pick the car up for either 1k or cheaper it would be a good deal. Honestly (of course just going off symptoms) it sounds like the car has a bad maf-t. Could be a simple fix and you have a good beater. Go check the car out personally, you have a good mechanical head on your shoulders, if you see something sketchy then run if not imo it would be a good deal.

Edit: looking at his pics on tuners he doesn't even have a filter on the MAF-T, so its a likely candidate.

Edit 2: After looking through this guys threads on tuners, he sounds like an idiot, beware of what he might have messed up!