Allen Carwash has prices ranging from $7.99 to $99.99 for various car wash options. The $7.99 option is a basic exterior-only carwash which is what I've used. You drive up to the stand, tell the attendant which car wash you want, drop off your keys, and wait for your car to be done. Depending on how many cars are ahead of yours, you may have to wait twenty minutes or more. However, the waiting room inside is unusually nice for a carwash. It is very spacious with plenty of seating, a TV, magazines, and grocery store-style refrigerated cases full of drinks and snacks for sale. If the weather's good, there's a large patio out front with tables and chairs where you can wait. Once your car is done, you pick it up out front. My car has always been squeaky clean after taking it to Allen Carwash, and I've been happy to drop some money in the tip box after it's done.