I agree with the others it may be worth contacting the seller. There are rules and what not they have to follow but I know they can edit their auctions for certain things. I had a saddle I wanted that I did not want to pay shipping for and I wanted to make an offer for it with local pickup. The seller changed the format to buy it now and added the local pickup option.
Your situation seems like one of those all they can do is say no things.
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"It is the unknown around the corner that turns my wheels." -- Heinz Stücke