That 85.10 price is in EUROs (I think) I did a quick curency converter and it still comes out to just over 100 bucks. I've been eyeballing this one but is the voltage to high for a 9920/8XL setup? If the curency converter is correct it would seem to be cheaper to order direct from Flightpower.
http://www.flightpower.co.uk/proddet...p?prod=4200023