Wow that is clean !! They normally show a bit of brassing on the shoulders. Its a late one somsorry to scare you but the later ones can have capacitor issues. Take the bottom off and have a look to see if it has tantalum capacitors in the base. If it does its fine but if they are can types they can be a problem. On your side of the pond Garys will fix it for 50 bucks so its not like a disaster.
The bottom capacitor is easy, the top one is a monster pain to do. Its a stunning deal though as its so clean.
Careful, the old collecting hobby can get to be a real monkey on your back.
The 370 was the budget one of the line, never even looked at one. If you want to open one up I would advise get a complete banger for a few bucks and practice, ditto with lenses, get a complete wreck and mess with it, that way if it all goes wrong its no loss so see its as a ten buck training program, if it all works out then you have bagged a bargain.
The firts lens I took to bits and was successful on was a Minolta 55mm f1.7 which was wrecked to start with. Got it all going again and clean. Most of the Minolta lenses are easy enough to work on, they are very simple construction. Other manufacturers not so easy....Nikon can be awkward, Pentax can be fragile, Olympus and Canon....forget it. Early Canon FD and FL are doable at great pain, later FDs nigh impossible.