Is there any way I can sell my mobile app UI and graphics?

Hi.

Is there any way I can sell my iPhone app UI? I worked on an iPhone app project early this year but due to personal reason, I have no choice but to discontinue my project. The UI was designed by a very professional graphics designer. I haven't worked on the source code though, which is a good thing because I would have to spend a lot of money on the programming phase.

Is there any website where I can sell my iPhone app UI without the source code? Thanks.
There is no need reveal more info.