Like those that book, sound genuine etc and I've spent a bit of time explaining how to get to landmark, where to park all that then at the end I confirm it with them and they say yes it's definite. Then they say ok how much is it?

I ask how can you confirm a booking without knowing what the prices are?
Them confirming the price before making a definite booking as it states prices clearly on all my ads, is perfectly acceptable of course but not knowing at all isn't as I could say ?500 an hour for all they know and all my explaining things has gone to waste. (Although I think a few of these have seen the prices really).
I feel like saying do you book and confirm a holiday without knowing how much will be taken off your card?