Link repost
I saw this on the larpers community today, and I thought I'd repost it because it looks cool.
http://www.merchants-guild.com/
It's an auction site solely for the paraphernalia of larpers, SCAdians, Renaissance Faire goers, and the like. It's brand-new, so there isn't much on it yet, but spreading the word could change that. This could be a really useful resource for costume and prop acquisition, and if you make stuff to sell, or just have stuff you want to get rid of, this might be the place. The prices look pretty reasonable too. I could see myself going here to fill in gaps in my costuming options.