We need something similar to safe trade, or the ability to send items, but for textures.
Maybe it should be that you upload your textures (named correctly), and send it to the other person. Then they can download it directly from toribash rather than going to another website to download it. Since the limit to the size of attachments is relatively small, and you cant attach items to private messages (that i know of), this would make texture sales a lot easier.

I also think you should have something like like the Mod and Replay sections, where you can upload free textures for everyone to use. Maybe even have a rating system.