- account-bound items
- bound-on-find items
- bound-on-use
I'm pretty relieved you have binding in the game because way back in the day (pre 2012) I was friends with a senior dev at Blizzard and I told him he absolutely needed to incorporate these sinks into Diablo 3 and he straight up told me they weren't going to go in that direction. The economy became flooded with the best items within short order and there was no way to get rid of them. Now the Diablo series doesn't even have an economy or auction house which was one of the best parts IMO.