Shopping online I came across a listing for a DVD of a movie I remembered, for $9.99. I clicked on the iOffer site and indicated my interest, I have three credit cards current and in good standing. The site wanted me to sign up for some intermediary arrangement in order to use one, at which point I decided it wasn't worth my while for a small one-shot and went away.
It seems this site charges people who list things with them for sale a fee, in this case $2.50. The person who uses them was notified of a sale and charged $2.50. Since then I have received numerous e-mails including an invoice, a "did you get your order?", a past due notice for payment, a "How did you like your purchase?", more late notices, and a "Non-payer buyer rating". Also messages from the seller via iOffer calling me a deadbeat!
The problem seems to be the seller has no knowledge that there was no sale. IOffer has no idea where to send the product, nor how I would have paid for it, nor any credit information. And their link to respond takes you nowhere but back to the sign-up I wasn't interested in. I have no way of letting the seller know I never bought anything.
Until they fix this problem, you should avoid iOffer.