To make bidding as transparent as possible, you can bid in specified bidding steps.
The first possible bid is set by the starting price; subsequent bids are based on the amount of the bids already placed. If the bid price is low, the bid increments are smaller; for higher bids, they are correspondingly larger. If you are not the highest bidder, you will always be shown the current next possible bidding step. If you have entered a maximum bid via the bidding agent, a higher maximum bid will be suggested. Using the bidding agent ensures that your bid is automatically increased with the next bid step as soon as another bid is received. This continues until your set maximum amount is reached.