Treasure Hunter

A player who's more interested in the monetary value of items than their actual impact on gameplay. Common in Role Playing Games, where all the different status effects and similar can be hard to understand or keep track of. The behavior usually fades fast in games where you can get Money for Nothing, but can hold on for quite a long time in other games.

Don't call them a thief, or they'll rip your lungs out!

The Diamond player archetype according to The Bartle Test of Player Psychology.