I've only been a vendor once at a flea market. I did pretty good in my book for what I was selling (cb radio equipment, sports cards, dvds, and misc. items). I also had a table set up to show and sell wood burnt art, but didn't sell any at the flea market.
First and foremost, I made it a point to say hi to as many people who past the table. Not just a general hi, I would do my best to make eye contact with them. About 60% to 70% of the time the people would at least slow down to take a glance or stop and chat it up for a bit and leave with a purchase.
A couple of tips that I used when I went to the flea market to generate more traffic and get extra sales:
1. Advertised on craigslist (I had a lot of people stop by just because they saw my ad on there.
2. Advertised on free radio swap shops (again, people sought me out just because they heard the ad).
3. Advertised on local hoby forums, such as for fishing and hunting. (got traffic from them).
4. Printed up a lot of business cards. One for each of my main product line business. (sports cards, cb shop, and custom wood burnt art). When someone was looking at a line specific table, I would introduce myself and hand them a business card from the table.
I neted about $450 to $500 at the flea martket. With the business cards, I netted about another 200 or so after the sale.
When I had someone really looking at certain items, like with the sports cards or cb radio equipment, I would offer to make bundle deals. When they were buying sports cards, and they were at a certain dollar amount, I would offer free cards of their favorite players. When they would look thorugh to find the cards they wanted for free, they would find more that they wanted to pay for. So, once again, I offered more free cards in addition to the ones they were buying.
Also, when they looked through the sports cards for certain players and did not find what they wanted, I offered to go through the rest of my collection when I got home and would give them a call or an email when I found stuff for them.
I know there are a lot of different tips people have for flea markets. These are just a few that I used. Please add to this thread. I would like to know how others make the flea markets better for themselves.