Note that this set has been widely counterfeited. A reliable way to check is to look at the lead-out grooves on the vinyl. The genuine articles have the matrix numbers stamped in while the fakes have them handwritten.
Another rare Who item that has been faked is the Anyway Anyhow Anywhere/Anytime You Want Me promo single. Once again the genuine article has a stamped matrix number and the counterfeit has it handwritten.