Led Zeppelin sale...

It's a promo, apparently rare.  Not sold for its "playability" of sound.  That's the way collectibles work.  (Newsflash).

It's not the most expensive version of the album.
The one most expensive will have turquoise letters on jacket and UK issue.
The original UK release has the best sound and the most rare.
The US promo also have great sound and rare.
There's no re-issue or MFSL sounds better.

I'm in the UK so I'll have to look out for that if I sell my house...