I've been waiting for something like this, looks like it's still early in development. I'm going to wait a week or two then pick it up for this forum. http://xenforo.com/community/threads/user-specific-styling-paid.43633/
CSS only, I assume? Graphics for each individual member would kill most servers. Also looks like its admin controlled rather than user controlled ...
Why would you buy stylized CSS? It's a feature with HTML5 that anyone can use, for free. It's replacing the need to use fonts on your site, you won't need to download those fonts to visitor computers anymore. - Might not be compatible with all mobile devices - Can replace images when making fancy text instead of needing to use text over image So there are benefits and negatives, whichever you choose don't pay for the stuff!
When I first saw this I thought it allowed the users to change their username color, this isn't the case and it's not something we'll add here as is.
It sounds awesome. Anything better than seeing ugly styles that don't really suit the sort of forum people go and post on. Had to laugh at one style today that I saw on another forum http://www.limboclub.com/forum It's pink and it doesn't suit the forum.