There are a couple of things to really watch on those saws.
1) The cases will crack and break along the handle usually under the cylinder. I bought a lot of saws and had 12-15 of these and every one had the tail broke on the bottom of the cases.
2) The air filter design wasn't the best in the world. Take the cover off the air cleaner box, raise the air filter, the boot underneath, make sure it is intact and the clamp around the carb inlet is still firmly attached and in good shape.
3) The ignitions are not the best in the world, if that one is bad let me know as I have a "modern" fix for that too.
I have one I am in the process of restoring one except I am changing a couple of things, I hate that plastic starter cover and have changed to a metal one off a P-42 saw and I did modernize the ignition on the saw.
Good Luck.........