In Beckton Boots Clearance shop they had the V.Smile learning systems for £32!
They had the one pictured, which I purchased, and they had the 'Dora the Explorer' pink version which has an improved joypad, for the same price.
Still priced at £49.99 on their website.
I have been considering purchasing one of these but didn't want the big outlay incase it became a 5 minute wonder but for this price I went for it!
They may be for sale in the clearance section of a normal Boots also - hope this helps!
Shortcut for pin 'Dora; system http://www.boots.com/shop/product_details.jsp?productid=1086034&classificationid=1047698