I'm sure he was pricing in the risk of it unexpectedly being a very difficult job etc., but trades are really pricing themselves to encourage more and more people to just do it themselves. I'm glad I know some stuff as I must have saved myself tens of thousands in avoided labour costs over the years.
There are some things I won't do myself, like structural building and going on the roof, but on the whole, it's doable and often to a higher standard.
I'm sure he was, I'd of gone £250 but £350 was just a step too far. The hardest bit was sizing the lead pipe to get the correct leadloc, could have just bought a couple but nowhere local sells them. Surprisingly easy to fit, I've always steered clear of messing with old lead pipes in the past.
Totally agree with the higher standard of work from doing it myself.