So... because one seller cancels some items for one buyer, that's a reason not to use
ebay?
Newsflash: this has nothing to do with
ebay.
I encounter this with show dealers all the time that also sell via their website,
ebay, BidStart, or anywhere else. They sell at one venue and forget to remove the item from the others.
Not related to
ebay in any way, shape, or form.