Typical scam going across the net... Smae scam, different variation... Goes like this:
Seller(you) advertises items, buyer(scammer) wants to buy said items. Buyer sends check for more than item is worth, asks seller to cash said check, money order, bank check, and send rest back to buyer. Seller deposits the check, withdraws remainder of money and sends back to buyer. Sellers bank allows check to deposit with the caveat that it takes a MINIMUM of 5 business days to verify check. By than, buyer is long gone, and seller is both FINANCIALLY AND LEGALLY responsible for the amount of the check. Sellers bank will clear out their account to reclaim money.
Seller is now pissed off and must report it to the police, BUT sellers bank will NOT return money because it is the SELLERS responsibility to deposit a "good" check. Seller will than need to pursue the buyer in a court of law to reclaim money lost.
in other words, DON"T DO IT!!!