I had the owner of our local tandoori ask me to clean his house once.
"How much you charge?" £12 i said.
"Thats too much I give you ten pounds". My price is £12.
"I will only give you ten pounds, you do them yes?". Ok I said I will do them for £10, which windows would you like me to miss?
"I want them all cleaning". Ok fine that will be £12 pounds please.
He walked off at that point.