Very nice. I will do the same at yard sales sometimes if no one's looking. The best one, a lady had a 14 karat gold angel pin at a yard sale and she wanted $30for it. I wasn't going to pay that but I look at her jackets in the same exact pin was on One of her old jackets. I looked at the pin sure enough 14 K i took it off the rack asked her how much you wanted for the jacket, she said one dollar!! I kept the pin and drop the jacket off at Goodwill!
My husband bought out a huge estate of some old man's clothes on hopes of finding money. The family wanted $10 for two whole closets full of clothing. There was nothing in there. But we got the little card from donating them so it was worth it. Keep searching that's an awesome find!