Get a picture fo him that shows what is left of the retention system that was on the brake. Then say...you took it off wrong and this is why...that will be your basis for fighting his "error" on eBay.
I would see items with $250 shipping charges. Now I know why.What’s worse is that now the selling fee applies to the entire total including the shipping and sales tax price, not just the item price. I suppose it was implemented to circumvent some other issues they were having though.