When in your safe house and you sell a car, you will only get half of its list value. However, there is a loophole that works well for pink slips that you have won and no longer want. Take your car to the shop. Go to the parts area. Go into the body kit, spoiler, hood, rims, and roof air areas and set everything to stock. When you check out, you will see anywhere from $1,000 to $18,000, depending on what pink slip car you are stripping. Do not try this with performance parts. The shop charges you money for downgrading. Once you have stripped your car of all accessories, leave. Then, go to your safe house. Sell the car, and you will have made a lot of money on the side. Do this every time you intend to sell any car.