I've had two of these in my hands before they hit these outrageous prices. The first one is a sad story...
I purchased a raw copy off eBay. The seller had it as NM and had decent pics posted from which I thought the book could hit 9.4 as is and probably higher if pressed, so I purchased it for, iirc, $150. The seller mailed it quickly, but sadly just put it in a bubble envelope, no cardboard, nothing! At time of delivery, the mailman of course folded it in half to fit it in the mailbox, so y'all can imagine my disappointment when I opened the envelope and saw what was inside...
Mailed it back for a full refund. I'm sure the seller must've sold for more soon thereafter.
The other I had was also a raw copy and I sold it a few years ago for a decent profit, but nothing near the current exorbitant prices.