Call for Artists, Making Money at Juried Art Fairs, Craft Shows and Festivals
I have small cards I cut from cardstock (mine is a light gray to blend in a little with my booth walls) with the title of the piece and the price. These are on double stick tape and go on the wall right next to the piece (my work is on individual shelves, yours might be hanging art, I don't know.)
This gives it more of a gallery feel, in my opinion, and increases the perceived value of the work.
Be cautious with garage sale dots ... they might make your work look like a bargain. If you go that way (and many do), I'd suggest the all white versions, and not the pastels or day-glo colors which have that "sale!" feeling about them.
I use a Brother label printer to make labels for my work. It is easy to customize labels with more info than just price