These are extremely popular around Christmas. I don't know how well they do at other times. I have also seen them go for $5. But the crafters I know said that you should charge 4 times the cost of materials for any craft fair items or you don't cover time and incidental costs.
I believe that the sweets sell better than the bean soups. A variety in flavor and color is good so that the people who do buy will get multiples.
One idea that I just had was to make sugar cookies mix and go to a baking store and get sugar red, white and blue stars to mix into the jar so it's colorful. Other colorful spring mix ins might be good. A specialty cake making store should have a huge variety - I've seen pink pigs before. They don't cost that much and add a lot of color.
One of our grade levels sold the jars during the holidays in order to raise money for a field trip. I'm not sure of their overall success, but they sold for $5 each. All ingredients were donated, they had to purchase the jars. I believe they raised about $750, but i'm not sure. (there are about 125 kids in the grade level)
We are holding a carnival for our school. An idea was brought forward to have booths in the Gym for sales such as spirit wear etc.. One booth that was talked about was the canning jar take~n~bake idea where you fill the jar with the dry ingredients for cooking meals and treats such as cookies, breads, soups, the like.
Question I have is have any of you folks done this before and what price ranges are good for sales and profit. I have over 50 recipes for the jars, I am just wondering if it is worth the effort.