I know what your talking about, I had went to one and had set up too and I didn't even make my table rent which was only $20 I think I might have made $5. What a big let down. The next time I went to one it was different I made out pretty good. The whole thing is it's the economy, what the person is looking for, Yes how it is advertised, how many more are in the area. Don't give up going to them and setting up you will have good days and bad ones. Even if you have to reduce your prices towards the middle or end of the day will help too. Have fun also make new friends,
Good luck.
Cheryl