I had posted 4 items on ebay for sale. They stayed posted on the ebay site for 7 days. At the end of the 7 days, the items did not sell, but yet paypal took money out of my bank account for the items listed on ebay, why is that?
It was most likely for your eBay seller fees. Login to your "My eBay" account, click on the "Account" tab and select the "Fees" link to see your eBay fees.
