Ordered one of these myself after considering getting it used from HMV for £10. Glad I looked this up, and bought one immediately. Comes with 12 month warranty too, so should give you peace of mind!
I think this is the cheapest price I have seen this go for new. Every game I have bought from Argos has been sealed, and I imagine this would apply here too.
UPDATE - Can those of yeee who have colded this please provide an explanation? I realise that the first BC might not be a globe-trotting adventure on the lines of COD, but it is still quite good. Especially for this price. Please find me a NEW BFBC on PS3 lower than this, only then cold this.