Used Chevrolet Engines

[mpalcknid]

I'm looking to buy a used Chevrolet engine but feeling a bit cautious. I’ve seen plenty of listings used Chevrolet engines for sale online, but how can I be sure I’m getting a good deal? What should I watch out for when buying a used Chevy engine?
If anyone has advice or has bought a used Chevy engine before, I’d really appreciate your insights—don’t want to make a costly mistake!
Thanks