Only a few hours of your time. A well known secret of used car dealerships is the importance of a GOOD detail job. If you've never heard of auto detailing, you'd be surprised at what it can do for an automobiles' appearance. Think of it this way. Interior, exterior, under the hood, in the trunk.
Prices are slightly higher for larger vans and trucks due to their size.
Look in your local yellow pages for local auto detailers. Take the time to call a few up and inquire about the 'price for service'. Be sure you tell them what type of automobile you have so they will be able to give you an accurate quote. You MUST clean out everything if you want to get top dollar for your auto. It gives the impression that the car has been well taken care of over the years.