OP
Knobhead
I have had this once, on a loft conversion that was being overseen by the customer. After giving them the quote, over a week later he phoned asking for an itemised quote.
I told him that i didn't have the time to list every switch or socket and as the builder/joiner had told him it sounded expensive, i suggested he had them do the work if it was that easy!
Even now, 6 months down the line he still hasn't had the work done, so it wasn't just me who was expensive then lol
Knowing the area your in, they’ll want 10% luck money back if they pay up!