I posted a similar question a few weeks ago - and funny thing is, only two minutes ago my Wii was delivered. I had called most shops, have been up and down the country (via web) to get one, then come accross Xomy.com who had a few in stock. I called them and found out that stock is very limited between now and Christmas. Also due to the low stock, sellers are paying slightly over the odds to get some in, that's why if they do, you and I are expected to pay a bit more for the basic Wii package. You will find some in shops, but you may need to go to places well out of town (I live near London.) Ebay prices seem to start off at about �150, but finish around �230-250. I payed just short of �190 for mine, and feel I got a decent deal. You can also try nindie.com and go to the store locator tab. Or try this link...
http://www.wii-consoles.co.uk/default.asp
Hope some of this helps?