It sounds like a good price at first glance - Toshiba machines are generally reliable in my experience and keep on going.
I have one which cost £1400 about 4 years ago (Cel. 366, 12.1 tft, cd-rom, Win98) and it still does the job for me (although, it functions only as a little used WordProcessor at the moment - when / if I have any library research to do).
My point is that it has put up with a lot of abuse in its life and has stood up to it quite well.
Have a look at Dell also - they often have good deals available. And have a look on Crucial.com/uk for the memory - if you know the model number of the machine you will be able to find out what type of RAM it takes, and th maximum possible.