I do keep my receipts. I'm not a professional, but I have sold a few things and did one church craft festival. I've only been in this hobby for a couple of years and I think you always spend more getting the tools that you need and will keep (hopefully) for a really long time, and of course, building your fabric stash...wait a minute...I think I'm kidding myself I spend way too much money, but I love learning this craft.