Do not buy anything from Daryl Finch @ the Junk Yard in Phelan CA

First, paying 750 dollars for an ANCIENT AC system is a dumbfuck move, when there are much better, NEW modern aftermarket systems to be had for almost the same price. Sorry, somebody had to say it.

That said, keep this in mind. A check is a signed CONTRACT. If both those checks have been presented to his bank and honored, then he can be sued for breach of contract.