Those "Pawn Stars" guys are BALLIN' ... because Chumlee just bought a BADASS Maserati -- and he used his haggling skills to knock a ton of cash off the sticker price!!!
TMZ spoke with Chum who tells us ... when he walked into the Vegas dealership Thursday, the guys wanted around $100k for the jet black whip. But Chum was able to drive off with the car for only $85,000.
The Old Man would be proud.