I feel the same intimidation when I go to Goodwill to buy jeans for making purses/totes. I usually buy several pairs when I can find the right ones, and in a variety of sizes, and always hope they don't ask about them. I had a jeans bag with me one time and the cashier commented on it, so I told her that was what these jeans were going to morph into, pointed out what I look for in buying them, and she was fascinated.