Something Smells Fishy...

If they want to pay shipping, ask them to send a prepaid return label with the check. Maybe that will at least get them to leave you alone.

The check will be fake. Federal banking regs require the bank clear the check in 3 days, which is too short a time to determine if it is fake or not. So the funds will become available and you will be able to withdraw them and wire them somewhere. After a couple of weeks, it will be clear the check was a fake and they will deduct it from your account. Meanwhile, some excuse to cancel the transaction will be presented, little Brandon needs an extra surgery, so I can't buy your $2,500 bike. Please wire the funds urgently. The hospital will not perform the operation until they get paid. My boy is dying and I cannot wait. There is a Western Union down the block from me. Send now.