Nice! A little oil goes a long way on cardboard and cement so hard to tell about the leak. Often the oil pressure sender will leak on left side of engine toward bottom, or the pushrod seals. Worst case scenario is the rear main. Can you tell where it is coming from? If not, then you have to clean off the engine and run it a while.
No matter what at $2K it's a good deal, at least at PNW prices.
"If you don't peer over the edge now and then, how do you know where it is?" The venerable Mr. Cob