Well, if you buy instead of rent, especially used car, that's what 99.99% of salesmen would do. "How much is that car?" - "well, how much can you pay?" They have sometimes prices posted but everybody knows these have little meaning except generic signal of "we consider it an expensive car" or "this one is cheap".
Agency : How much did you pay for your last rental car?
Applicant : I don't see how that matters. What are you charging?
Agency : We like to know what you paid before so you get a fair rate.
Applicant : I paid market rates.
Agency : Sorry, we must know how much...