items for sale? do a search here for craft items or such.. it will show you who sold what the most at fairs which is semi important. I would personally make pot holders. Everyone needs new potholders and maybe matching towels with fabric trim? not expensive to make AND not expensive to buy. Money is tight for the bulk of people these days and it appears the less expensive items always sell faster. Table runners, mats etc?
if your looking how to setup your stall those craft fairs blogs here help too as they have pics of their stalls.
BEST OF LUCK!!