While not a large number and I'm not going to be retiring any time soon, I got 10 sales for my Mac To Do List App. This is my first attempt at building and selling a product and am learning quite a bit around "product discovery". I've spent more time trying to promote and advertise my product than I did actually coding it. Quite a valuable experience. If you have any advice on your experience in growing sales for your product, I'd be happy to hear from you. Cheers!