I'll hime in here in a bit. But suffice it to say that unless you're buying a new airplane with a full unconditional warranty, well...
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you're gonna find something.

In my case, it was three bad cylinders after I had put about 60 hours on Mary Lou. This was in 2005. And this was with a pre-buy/annual in 2004.
Anout $6000 later, well... things were ok.

Next annual (2006) it was another $2000.
Mike Arman says it best - he who has the cash holds the cards.
Buyer beware.