I would buy bathroom fixtures from an installer, and certainly negotiate the number of labor hours, and a discount off retail price of the fixtures themselves.

I would buy bathroom fixtures from an installer, and certainly negotiate the number of labor hours, and a discount off retail price of the fixtures themselves. People negotiate the price of a $40 ride to the airport with taxi drivers every day. I negotiated the price of a pair of prescription glasses just yesterday, and they cost less than $300. So... yes?