Hold my hand
A colleague quoted a customer £400.00 for wiping their server, installing M$ Windows 2003 Sever on it and shipping it to Scotland.
Customer: "Hi look thanks for the quote but we want to save a bit of money so I'll install it myself, I was just wondering if it would be OK to give you a ring when I do the install of 2003 server if I get any problems?"
Colleague: "Cough! Splutter! What?"
I'd have said "Yeah OK the help you want will cost £399.99 is that OK?"