Cost myself money on eBay
I have been going through a few things and listing them on eBay or Amazon.com, mostly to get rid of them, but if I get a few bucks out of it, that is even better. I listed a book on eBay, started it off at $0.99 and whatever it brought was fine with me. It ended up selling for $12, which was slightly better than I thought it might go for.
The buyer paid via Paypal pretty quick, requesting Priority Mail which was fine except I apparently messed up when I made my listing. I looked around at some similar listings when I was deciding on how much to charge for shipping and $3.50 seemed pretty fair. The problem was I didn’t check my eBay defaults though, which was Priority instead of Media Mail. $3.50 would have been fair for Media Mail, not so much for the Priority Mail. The Priority Mail ended up costing about $6, but my mistake and thus my loss.
Next time, I’ll double check my shipping rates more carefully.