Buying an engine from ebay... GOOD OR BAD?

this such an open ended question. what kind of motor? do you need a complete, running motor? is it for an engine swap or for a repair? are you doing the install or are you having a shop do an install? what's your budget? what's your timeline? what level of risk do you deem acceptable? do you have the finances to potentially eat that purchase, plus labor or time lost and pay all of that out again?

think about those answers and then form your decision from there.