The bid and ask are the best prices offered by the buyers and sellers.

The bid is the price that the buyers are willing to pay.

The ask is the price that the sellers are willing to pay.

"Ask" is the price sellers are asking for their commodity. "Bid" is the price buyers are willing to pay.

They do not ask for your credit card info to place a bid on EBay. If you accidently placed a bid you should try to contact the seller to see if they will let you cancel your purchase. If they will not, then you will have to pay for the item if you are the highest bidder.

Selling at a price equal to or lower than the bid price or buying at a price equal to or higher than the ask price.