Where to buy in London?

Hi,
I'm new here - I'm heading up to London this weekend and hoping to come back with a PSP - preferably the US version. My initial think is Tottenham Court Road - that's usually a good place for imported gadgets. However, it's not the cheapest area - I've heard reports that they're charging 300 quid for a value pack up there! So I wondered if anyone knows of any shops in London selling the US PSP at a resonable price? (I was hoping to get one for 200 tops).

Thanks,
Ric

not a great place but X-Electrical in Kingston were selling it for £300 months ago so its probably gone down in price. However thats not definate and Kingston isn't in London only near it and X is pretty hard to find as most think its just a music shop...

...sorry this has been a waste of a post best stick to Tottenham Court Road you'll probably find it cheaper than £300 :)