Few things increase the value of a car or truck more than 22 inch rims and tires. In fact, I personally like chrome rims the best. They add a lot of style to most automobiles and they increase the valley by the cost of the rims and tires plus the improvement on the aesthetic appearance.
Custom truck wheels and tires can make an old, beat up truck look a lot nicer. That and a nice coat of paint can increase the value ten fold. Also, getting new upholstery can increase your cars wealth. That is because people want to be comfortable and new upholstery usually helps this.
After you do these things to your automobile, you can continue to increase its value by adding things like a stereo system and tinting the windows. Each little thing you do will make you car look better, drive better and you will feel better.