Flip items that are rapidly rising or crashing. Some people will say you shouldn't flip items that are crashing, but it works great because you can buy stuff for lower than what it's selling for. I'm not sure on the most recent prices , but third-age usually works great. I also like flipping third-age because it doesn't update everyday. I made 1.5-2m each flipping third-age range top and bottoms. So 100m should make you 10-20m a day depending how often you check in.