There are still plenty of piston engines in Ebay
If this guy is able to find somebody to pay quadruple price for an LA46, good for him. With millions of browsers he might get lucky.
There are still lots of good engines on The Bay for $50 or less. A few may be worn out, but in my experience at least 90% are very low time or even zero time. Many people buy the parts and never finish the project.
I can spot a worn out engine by the worn out verbage in the sell-job.