How to make 20 million in ten minutes. Sounds like major heist. The trick here (I think) is to upgrade the 35th anniversary Camero with all the parts you can buy then exit the upgrade menu. If you exit out to dashboard and sign back in, the car retains all the upgrades, however your account is reset to what it was before. So you have not spent any money upgrading the car. The car then can be sold for one million. Be warned the video below is ten minutes long. Credit goes to nsomnairedline for the video.