Yes it does look suspicious but I guess at the end of the day they are probably only pushing the price up enough to achieve a certain degree of profit. If the car is then still good value then it just becomes a case of buyer beware
otoh if they get a bidder hooked they could up the price several times and then I think that is definitely out of order.
Sadly it was the quality of this traders auctions that got me hooked on my first 75
