Many of us vendors pay table or some kind of venue rent. There are many places to sell, such as kiosks and bulletin boards. I'd be interested in hearing from people who are vendors or friends of vendors, how to sell in public inexpensively. I'll start, I sold arts and crafts in farmer's markets for a few years. It was cheaper than the rent at craft fairs, but didn't yield much profit. Made friend with some farm-folk, though! :)