I have got the Brinsea octagon 20 advance but without cooling function, it is a couple of years old now. It has been a great incy for me, the hatch rate is very good and it is easy to use. See if you can find a slightly older one without the cooling thingy for cheaper (pardon the pun) I would think agricultural merchants will still have some of the older ones in stock. It'd be worth ringing around. Or try ebay.