were can i buy one from n 4 how mutch

http://www.dabs.com
http://www.ebay.co.uk
http://www.ebuyer.com
http://www.overclockers.co.uk
http://www.dsl-warehouse.co.uk

Can be anywhere from around £20 - £200, depending on what you need.

Hope this helps,

Remember the router that you need will depend on the type of internet connection you have. (ie. there are different ones for asdl - via your phoneline - and via cable - Virgin Media).

Have a look at http://www.networksforhome.com/ for some more information on setting up a wireless network.