Does she really want/need a 17 inch laptop??? There just so big and heavy noramlly, that it puts me off using it as a laptop, and it becomes a desktop computer…
As for price of laptops, I dont think they’ll be much variation, occasionally you may get a good discounted one, but the price they come in at is gonna be much the same.
As for spec, for £400 I’d expect Intel core 2 duo process at around 2ghz, 2gb ram minimum, 120gb hardrive, and a ok screen. I suggest she has a look round comet/currys etc, and picks one that has a good quality feel to it and a nice screen! then go and have a look on the web and see what comes up.