HMV stores are doing The Texas Chain Saw Massacre - 40th Anniversary Limited Edition Steelbook on Blu-ray for only £12.99. This is the cheapest on the land and even cheaper than the standard Keep Case edition.
Review for the US release: http://www.blu-ray.com/movies/The-Texas-Chain-Saw-Massacre-Blu-ray/106447/#Review
Please note this is a Remastered version and has far more superior picture & sound quality and comes Highly Recommended. It's also been reported that the picture quality is actually better than found on the US release.