We charge
$10
$13
$16
$20
That is good for an IBA. In my neck of the woods, those would be the prices you would see at a full serve or flex serve tunnel with manual prep, interiors and towel dry.
There is a large chain here, (Delta Sonic) that charges $16 for the top wash and has a two week, rewash twice for free attached to that package. It is a flex serve tunnel. Basically, wash three times on the top package wash - wheels, tire shine, ccp, polish, rust inhibitor, etc. for $16. They are very large volume. An IBA with prices from $10 - $20 would be unheard of. Our IBA's max out around $10 here.