this beauty arrived today...
Bout a 3.0-3.5. Was really attracted to the bright colors. Yes this was the one on eBay, if anyone noticed it. When the seller first listed it he was asking $1200, which was way more than what I was willing to pay, but I put it on my watch just to see how quickly it would sell. I noticed he continued to come down on the price, and was surprised it was still there. I threw out an offer, and we made a deal. Great seller.
No recent sales on GPA...last one was in 2015 for close to $300 for a 4.0 I think. I've never noticed one for sale. I'd be curious to see what one would go for in auction. If anyone knows more I'd love more info. Just a classic and seemingly rare book that I felt compelled to pull the trigger on.