I thought about buying an item on iOffer and was in contact with seller. He and I both agreed not to complete the transaction. No transaction ever took place. Ioffer kept sending me invoices for the transaction anyway. The would-be seller sent me emails with copies of the invoices on which he had marked the transaction canceled. Nevertheless, ioffer marked me as a "nonpaying buyer" and threatened to damage my reputation on their site.
Also, on most shopping websites, you can put an item in the cart and until you make it absolutely clear that you are buying the item, there is no transaction. DO NOT PUT ITEMS IN YOUR IOFFER CART. IF YOU DO, THEY WILL IMMEDIATELY SEND YOU AN INVOICE BEFORE ANY TRANSACTION HAS BEEN COMPLETED. Several years ago, I had a few good transactions with them. But I will NEVER go near that site again.