If you were the only one bidding and you paid the start price, you were the only one that wanted the bike at that price, you over paid.
Many cars do, most don’t. All prices fluctuate.
I’ve seen your car threads, Audi r8 etc, not exactly run of the mill.
So hypothetically if I pay £50 for a bike on eBay ….. and then sell that same bike for £500 the next day … I’ve overpaid ?
You can’t assume that because nobody has bid that the value is the bid which it finished at. So many factors go into it , inc how accurate the listing is and how much spare cash buyers have at that time.
I run normal cars for me and wife daily which are Ford mainly. Purchased new with hefty discounts.