There is at least the possibility thaat it will still be a very good deal. My own Bonneville, for example, is a 97 and just turned 98,000 miles. It has been wrecked to the tune of $8500 front end damage all repaired by insurance in 99 right after I got it. Since then it has been expertly dealer-maintained, including major issues like upper and lower intakes, ac compressor, ps pump, and tensioner pulley. For the occasional cosmetic scuffs, I've had the front and rear bumpers refinished, I've had the sideview mirrors refinished, and the right front fender replaced when I bumped a parking garage pillar with it.
Despite what sounds like a lot of problems, the car is mechanically perfect, as well as the body. I intend to keep it, as it'* pretty much just like it was when I bought it in 1999. Is it worth $1200? I'm sure it is.
I doubt that most car owners take as good care of their cars as we do on this club, but it is at least theoretically possible that with proper maintenance, a 1995 SE with 100,000 miles could be just fine. However as you described it, it sounds as though it needs the collision damage repaired still, and this could easily exceed $1200 for the cost of repairs. So if you buy, I'd make sure it'* repaired properly first.
97 SE, teflon wiper blades, Dunlop Sport A-2 tires, Leather steering wheel cover, Pioneer DEH-P480MP mp3 CDRW head unit, Pioneer 12-disc changer, iPod hookup, Boston Acoustic 3 way 6x9'*, Boston acoustic separates in door pods, Alpine 4 channel amp in trunk. Magnaflow dual outlet muffler and Ractive stainless tips. Autozone rice pipe and K&N 4750 intake kit. Clear corner lights. Energy Suspension end links.