If a certain lot is at $200, and you'd be willing to pay up to $400 for it,
you could raise it to $220 with a max of $395.
If someone after you raises the lot to $242, we'll automatically put you in at $269.
If someone after that raises the lot to $296, we'll put you in at $326.
And so on untill we reach your maximum.
But if no one bids on the item, you get it for your initial bid of $220.