No, registration is free!
We require a valid Visa or Mastercard credit card be entered into your profile before you start bidding on items to ensure that you are a serious buyer. The system will check your card to ensure it is valid by posting a $1 pre-authorization. Note that the pre-authorization amount will fall off after one week, and this is NOT a charge to your credit card.
Your card will only be charged if/when you win an item.