An incentive to bid higher or lower then it obviously does not meet the characteristics bidding. Or an incentive to Is not participating in the bid or withdraw the bid.
To motivate the people to bid higher or lower until it apparently does not conform to the style, quote, or to motivate the people to participate in a bid or withdraw the bid.
To motivate people to make the quote that the high or low until it was obvious that it was not in accordance with the Quote or to motivate people to participate in the user that is not in the Quote or withdraw a quote