What wil I get? - You will get the Most Expensive Link in the world for your page.
How much does it cost? - Only you can answer this question, how do you think, how much does the most expensive link cost? Answer this question and... stake!
What is term of the link sale? - The link is yours until someone buys it for a greater sum than you have paid. An auction will be opened in this case. If as a result of auction you are not the one who owns a link, I return to you the sum you have paid for the link + 10 % margin. You are a winner in any case!
However, if you want that link to be yours for ever…