Ian You may well be right but this particular e-bay seller mentioned seems to know very accurately what his items will sell for and he reguarly gets prices way above that of other sellers for similar items. Unless he has made a big mistake then I expect him to get £35 for it.
The problem seems to be that there are few sellers who offer bits and pieces the way the seller in question is able to. I can only assume he has "sources" as they say and its the olrd story of supply and demand again.
Best of luck in finding a neg carrier.