Note this is the LIMITED EDITION copy - not the value bundle i.e. wireless controllers, rock band 2 drums, not for sale online anywhere (afaik) below £99.
There were a dozen or so copies in my local HMV (Milton Keynes) priced £69.99 new. That's £30 less than anywhere I can see online. Hopefully it's like this in HMV stores across the country, but I can't be sure since it's not advertised at this price on their site!
Worth a look at your local store anyway.. also I'm not sure if it's PS3 only, or multi-platform. The store I was in only had PS3 copies out. Like I said, have a look.. and good luck :)