Adding accessories to an already distressed or aged car can actually backfire on the dealer. In my opinion the return is only equal to the value of the added item and in most cases lowers your SRP’s (Vehicle Search Results Pages) because it raises the price above other similar cars in your market.

Dealers like to add “profit center” items such as alarms, custom sound systems, and navigation. The side effect of adding these accessory in advance is that wholesalers don’t want them. And in some cases immediately remove the accessory and sell it on ebay.

Why? accessories are so personality specific, so unless the perfect buyer buys the car, the accessory can actually be a detriment to the sale. Sort of like a pool can sometimes slow down the sale of a house, when some customers don’t want the responsibility of cleaning and maintaining.