For anyone inquiring it's quite obvious what's going on.
Bushido tells you he's buying an item, goes on to a cheap 3rd party csgo market website (we all know which one) buys said skin for you (7 day trade time)
sells it to you for FG, uses FG to buy RSGP, sells rsgp to 3rd party website, profit irl $.
1000$ on this csgo skin website returns you roughly 1600$ US after you go through the buying/selling everything.