If anyone wants to make money inefficiently: Sell prior editions of textbooks using Amazon FBA. Surprisingly a lot of Prime members buy them at decent prices -

If anyone wants to make money inefficiently: Sell prior editions of textbooks using Amazon FBA. Surprisingly a lot of Prime members buy them at decent prices - - even in some cases two editions prior. For a few years every time my library had a book sale, I'd find plenty of them for about $4 each. The hope was to sell them for $20 or more. Figuring out which ones would sell was a bit of an art, though.