A lot depends on the price. How often where the oil changes done? It sounds like the car has never seen 65 mph. Test drive it, take it out on the highway, once warmed up get on the gas while looking at the exhaust to see any type of smoke is coming out. You may get some black smoke at first if its never been driven hard. Check the tranny fluid, does it smell burnt or feel gritty? How are the tires?
The seat can be fixed, might just be a fuse. For the right price most cars can made good again. Value is probably around $3000-$4000. Due your due diligence and look it over good.