A car (or anything else for that matter) is worth what someone is willing to pay for it. By all accounts, EAG is wildly successful at what they do. Yes, they charge TOP dollar. But you get what you pay for, IMHO, and that of many others too.
My guess is that someone will snap up that ZHP at their asking price. Eventually. It's a $45k car (at 2005 dollar valuation) that's essentially "new". Someone who absolutely loves the ZHP and doesn't want a high-mile car or one with a mysterious pedigree, and has the means, won't flinch (too hard) at that price. Hell, that barely buys a new Camry nowadays.
I bought a 2002 M5 from EAG in July, and it was a stellar experience. The M5 had over $6500 in maintenance and preventive service performed by EAG before my purchase. After looking my "new" car over, my neighbor about shit when I told him that it was not a brand new car, but in fact was 13 years old.
Eric @ EAG told me a ton of their business is repeat customers. People wouldn't keep coming back if they didn't feel they received value on their first transaction. I'm not surprised - good chance I'll be back eventually too.
'21 M2 Competition
'08 Z4 M Coupé
'19 Golf R