We shouldn't forget that players are worth few millions and difference between every bid is around 0,76% of players value = 0,0076
So if for eg. player is worth 10M, difference between bids is like 76K. It would take in total 132 bids just to increase price from starting one by 10M (start price eg. 8.5M + 10M = 18,5M after 132 bids)