Another one of my favorites is this 440 I got for $50 worth of fire wood. It was a very low hour saw, and has compression relief. It needed a piston and a handlebar. It had all new tune up parts before I got it, and burned up because someone set the Hi screw 1/4 turn out (instead of the low) after tuning it. Don't know if it was the owner or the shop.
I deleted the base gasket and advanced the timing and it runs just great (you would think it is a 10 mm). Total cost about $115. It is on the floor, on the right, and wears a 20" bar.