Iconic album in its first state in top condition... those with deep pockets will always drive the market. I do vaguely recall this auction (can't look it up now), and similar copies have gone for over $2K numerous times.
Yes, the tape speed is wrong on all early pressings, and I'm not sure it was corrected until the CD era. Someone with more knowledge can probably add more here. I'm fine with a Japanese mono at this point; years ago, I had a very early but kind of battered copy, and sold it for $40. Could probably get a lot more now!