Why do people buy Junk?

I am sorry if this is in wrong topic, but before moving it can anyone please tell me why people buy junk in here?

What I am thinking is : They take junk in game and give gp for it AND pay IRL cash for the junk.

Wtf? o.0

 

You have it all wrong.

Say there is 2 players

Player A: Has 5m GP
Player B: Has 5m Junk and $2.50

Player B sends Player A $0.50 per mill of junk. Player A trades Player B and exchanges his GP for Player B's Junk.

In the end this is how it looks.

Player A: Has 5m Junk and $2.50
Player B: Has 5m gp

 

This ^

Also, some people know others who buy junk and may buy junk for .75, and sell back the junk for .50

 

Answered. Thanks PK