I too have seen this before. Unfortunately, the banking system , by law, has to clear any deposited checks within a certain number of days. That's not to say that once you retrieve these cleared funds, that it won't bounce and come back to bite you later. I should know, it happened to me. Luckily, it wasn't for much money, but it happens. Bottom line?
DON'T ACCEPT CHECKS FROM ANYONE FOR ANYTHING!!! Unless you absolutely know and trust the other party. Good lookin out Ramaspot.