Well... If you get a group of boys coming round your house asking if want your car hand washed then your going to pay about 5 quid. If you go to a shopping center for example and there are people there that wash your carwhile your off shopping then your going to pay around 6 quid.. but if you want your car washed well and use the car washes by the petol stations then your going to be paying around- 4-7 quid depending on what type of wash you have!! :) hope that was helpful for you.
*A quid is a pound sterling ...