I've just bought one of these as well.
Argos do the Chef for £44.99 and you see it at on-line stores for £39.99, but then you'll normally have to pay £5 postage unless you're buying lots of other stuff at the same time. So £49.95 is OK, but you can get it a little cheaper. Remember, you'll need a regulator for your chosen type of gas bottle.
We bought one from Tescos a few weeks ago - it was labelled on the shelf as costing £44.97, but when we paid at the checkout, they charged us £49.95. When we went to customer services they gave us all our money back and we got the stove for free - we were amazed! I expect they have sorted this out now, but it's worth checking the price on the shelf before you buy!