Hi Chris. £400 is a very good price, so if I did knock anything off the price it would only be a few quid.
I noticed that you were looking for the integrated version of this amp in another thread, so I can see where you're coming from. How much would you be looking at spending on a pre/power combo? I might consider doing you a bundle deal with a very nice passive preamp I have spare at the moment. Cheers.