Aftermarket additions are always a toss-up as to added value. Most used car dealerships will toss on a $1,000 set of aftermarket wheels and tires and jack up the price by $2,000 to $3,000. Ask if they have the stock wheels and tires to put on for a lower selling price even if you want the aftermarket rims. That increases your haggling strength by showing you don’t prize the aftermarket gear. Also, remember aftermarket additions sometimes detract from the selling price, like this Rubicon Unlimited that had the factory rock rails replaced by goofy nerf steps.