Here are some paperback books you probably didn't know could be worth some good money. Choose Your Own Adventure books are very popular when you sell them in lots. This particular collection took me over 6 months to collect, but it was worth the wait. The books cost me between 10 to 50 cents each.
Selling books in lots is what I do best and enjoy the most. Although I have learned other niches.
So, next time your at a garage sale be sure to look carefully in that box of paperbacks.