Scammer on eBay

Some seller on eBay just tried to get an extra $1.55 out of me for a book I paid for after I won the auction. Can you believe it? He sent me this message, prior to the auction's end, but unfortunately didn't see it until after I actually paid for the item. This is what he said:

Dear stunatra,

i see that you are the high bidder for my item the Dexter Novel. Unfortunately i cannot sell this item for less than 7.99 plus shipping. this means that if you win the auction you must pay an additional 1.55 plus the cost of shipping. let me know if you want this item. as soon as i recieve the payment i will ship it out. if you win the auction i will send you an invoice stating the calculations i just described to you in this message. thanks for bidding!

If this fucktard wanted at least $7.99 for the fucking book, why'd he bother having an auction then? He should have listed it as buy it now for $7.99 + shipping. That would have been the right thing to do.

I told him he can either send me the book or refund my money. He is not getting an additional $1.55 out of me. If he fails to comply, I will report him to eBay. That is what he'll get for not following the rules.

Of all the sellers listing the same item on eBay, I had to pick this nitwit. Unbelievable.