How do I determine profit or loss on 1099-K without receipts?
I sold a few hundred vinyl records in 2023 that I had in my collection. Some I had for years and others for a short time. I purchased some individually from stores, garage sales, etc. and other times I would buy another person's collection. I do not have many receipts for the albums and most transactions were in cash. So how do I determine if I made a profit or loss and how much? I assume this would go on the 1099-K form?