Interesting idea. A few problems I had browsing from an Android tablet: the categories pages show up empty (no item, obviously, but I mean empty as in blank page), the dropdown and search box show up on the how it works page. Also, I'd make the search field larger. But the star is the super-simple submission process, congrats about that!

Needs an "all" (non-filtered) option, especially in its infancy. I imagine there's zero items near me, but I'm not going to click every category to find out.

Good thinking, the only listing is by me and it's just a test post. Will add this, thanks

It's definitely something that gave me an idea.