Great! I already have it but it's a great deal! Have you seen HMVs sale. I saw absolutely every Queen CD for £4.99!!!!
It was only the digipacks that were £16.99!
I haven't bought the 2CD version of On Fire (yet), but I won't buy it from the UK either, since I've heard it's copy protected (aka damaged), whereas in Canada (and USA), our copies don't have copy protection on them.
If it wasn't copy protected, I would buy it from that site you listed though