There’s no question that mobile apps are a booming business and a new website called Apptopia wants to help developers captilize on this by selling their apps. And we’re not talking about selling an app to users — we’re talking about selling complete ownership of an app, handing over the reigns to a big company or business.

Apptopia is a marketplace for developers to sell their mobile apps — including code, users and revenue — after they move on to another great idea , take other responsibilities or just want to make some additional cash. Apptopia is a self-serve platform like eBay or Amazon. Developers just sync their developer account when they sign up to list an app. When an app sells, however, Apptopia does help broker the sale. For instance, it works with the buyer and seller to transfer the code.

Buyers can search for apps in several categories, including education, business, photography, games, lifestyle, healthcare and fitness and medical. Each app listing includes reviews and ratings and provides information about the total revenue, total downloads, the number of downloads during the best and worst months, the current bid amount and the time left to buy.

For each app sold, the company takes 15% of the sale and may eventually charge a listing fee price of up to $50.