To avoid thousands of single cent bids, we implement a system that required bids to be reasonably larger than the previous bid. The amount changes as the range the bid is in changes. The current structure is:

$.75-$4.99	$.25
$5.00-$14.99	$.50
$15.00-$79.99	$1.00
$80.00-$499.99	$5.00
$500+	$10.00

(Koku has an increment of one)