How can I monetize torrent search engine?

I have a torrent search engine which is 8 months old and have stable 40-50 unique impressions a day (80% Search Engine) traffic, ~18 000 indexed pages. But I do not know how to monetize it

Every suggestion is appreciated.

Or if the site cannot be monetized or the income will be something like 5-10$ a month, please tell me a place where I can sell it.

Thanks in advanced!

sell Usenext?