With all due respect to sellers....
You know, it seems that shipping before the receipt of funds is kind of dangerous. I always ask the seller if they will take a personal check, hold the item for a week after depositing the check, THEN ship. So far, no one has refused.
I would not ship to anyone until it is paid for.....and the check has cleared. If everyone did that, we would have no issues.
I understand the desire to trust our fellow man. I learned long ago that unless you kow them, have done business with them, and have been piad by them in the past, no shipping until the check has cleared.