Poster of auction can put any price they want. If nobody wants it for that price they just won't bid.
Simple as that
The thing is I want to negotiate with OP because I am interested in buying the account. It's called being fair mate, if he wants the account sold, he should be fair in pricing the account.
You should put reasoning behind why you think what his account is worth.
A formula equating the worth of his post quality perhaps.
Send him your offer, if he responds then good for you M8.