Believe it or not, I'm not a huge fan of flea markets, but I go usually twice a week to my local flea market...mostly for exercise and be out among people.
Searches and FindsTypically when I go, I look for anything fiber related. I don't always buy everything I find...either it's not something I'm interested in (loom shuttles, yarn cones, sewing baskets, etc.) or the price is higher than I care to pay.
But everyone once in a while, I'll find your grandmother's set of knitting needles, or an interesting old Vogue Knitting magazine, and the price is reasonable enough to purchase it.
My latest find is what I thought was an old wooden Tunisian crochet hook.