I just discovered this is FINALLY being released very shortly (25th October, to be precise!) and so went price hunting.
***EDIT: I have amended this to the Zavvi deal since it's now the current best price available for this.***
Other retailers selling at similar prices include:
The Hut: £37.85
FEATURES: (And yes, Aliens: Special Edition IS included :D)
6 x BD Discs:
• 4 film discs
• Two versions of each movie (Directors Cut or Special Edition & Theatrical Version) in High Definition, plus commentaries
• 2 discs of Bonus Material
• Over 60 hours of extra features, including every piece of bonus material ever released
• Including over 4 hours of NEVER BEFORE SEEN content
• New MU-TH-UR Mode, a fully interactive companion takes the extensive materials in the ALIEN ANTHOLOGY and puts them in the user’s hand – connecting fans to special features on all six discs and instantly providing an index of all available ALIEN content.
And that's not including all the special features (loads!).
Please don't vote cold because you're 'going to wait until it's £17.99' or whatever, this deal is the current cheapest price for the early adopters who want it on release.
If you know of any widely available voucher codes for any of the similarly priced retailers, do let us know!