A bit of ebay history....
Years ago it was possible to add an auction-style listing for multiple identical items. Bidders named their price and the quantity of those available that they wished to bid for. If somebody else came along and bid a higher amount then the lowest bidder would be knocked out of the auction. When the auction ended the identical items were split between the bidders based on their requested quantity and they all paid the LOWEST price. If I remember correctly it worked like this...
I have five things for sale.
Bidder 1 wants 2 and bids £1 for each.
Bidder 2 wants 1 and bids £2.
Bidder 3 wants 2 and bids £3 for each.
Bidder 4 wants 2 and bids £4 for each.
When the auction ends bidder 1 would get nothing. Bidders 2, 3 and 4 would get their requested quantity but they would all only pay £2 for each.
Not surprisingly, a lot of people did not understand how this worked so ebay withdrew the facility. Multiple identical items can now only be sold on Buy-It-Now fixed price sales, or by making each items description unique.
For those of us living in the proverbial middle-of-nowhere ebay is an absolute essential part of my life and work. With no shops to speak of ebay (and Amazon) provides the stuff I need to do my job.
Out of curiosity I just searched for "Jaguar X-type brake master-cylinder, new". 18 items, all brake cylinders, no washing machines.