Is that what the man said about the one on AutoTrader? With only 60K miles? Hmmmm... I dunno. It takes talent to crater a Miata motor in only 60K miles - I'd be wary of other funny business (generally "rode hard and put up wet" - zero maintenance and/or care). Check it out very thoroughly, and you're probably okay...
Of course... what the hell do I know? I bought mine sight-unseen off eBay from some dude in backwoods Oklahoma... so far, so good!