Argos have a few Wii Fit bundles in stock, priced from £97.89 Enter the discount code XMASDISCOUNT for £5 off orders over £50 and £10 off orders over £100 (Valid on home delivery orders only). Free delivery code - AFD10, valid on order over £50.
I got one from Game this morning for £68. There was a large queue as they had just got a shipment in but the lady said they would probably go by 11am. It's first come first served so I recommend phoning some shops and asking when they get them in so you can go down first thing and get one.
Don't trust www.wii-consoles.co.uk. I got an email at 00:58.05 today saying Amazon, as of 00:56.41, had them in stock for the RRP. I clicked the link within seconds of receiving the message, and there was the Wii Fit in stock.....for double the RRP, from a second party seller.
Everywhere ATM, are running out fast within seconds in some cases. so it was in stock when the email was sent, but when you clicked the £68 one had ran out. most shops are selling out extremely fast, when the get them in.
I have found http://www.wii-consoles.co.uk/wii-fit-in-stock.asp to be accurate. It was through their alerts that we got a Wii Fit from Tesco Direct about half an hour ago for £68. There is a another stock website, http://www.wiipreorder.co.uk/wii-fit.aspx that gives historic data of when retailers have had stock in and when it goes OOS again. The Amazon info on there shows their stock usually goes in less than a minute!
I found these two websites more trustworthy http://www.ecbiz.co.uk/wiifit.htm to get live wii fit availability prices and a another page with email alerts for wii fit in stock £68.00 http://www.gamestock.co.uk/wii-fit