I'm working on a project and I'm curious to know what features people look for when buying a 3D model. I know the features will change with each type of model, but it will help to get an idea of what's really important.  For example, when I buy clothing, one of the features I look for the number of morphs available and the number of additional materials that are offered for that model by other vendors.  But when it comes to cars, I pretty much want the car doors to open, the seats to move, and the wheels to turn.

What features do you look for when buying a 3D model?