>>533612132
Biggest glitch I used was back when if you canceled grabbing gold bars and started to grab them again it would refill the cart in the casino.
But I also played enough casino heists that me and by buddy could clear the gold carts after they fixed the glitch.
I never did the garage trade-in glitch, I actually noticed the price difference before people started abusing it like crazy, I still got 2 garages that trade-in for way more than they should, one is 400k another is 1 million.