Here is what the online valuation sites say The Gray Lady is worth:

HAGERTY - $24,500

NADA - $19,300 (Avg) - $35,300 (High)

HEMMINGS - $28,425 (Avg) - $42,900 (High)

COLLECTOR CAR MARKET REPORT - $27,200 + 10% for sabre wheels = $29,920

That is a beautiful car, and I would think well worth the price.
Marty R. - AACA Director & VP
Senior Master Judge

Fantastic car and the price is so fair.  It could not be restored for less then $75,000
and still would lack the original provenance of this car!  Someone add this to your collection.
Imperial62 -

Excellent color combination, Dave!  Conservative, but not black,
and very distinguished looking--your name suits her well.
John S. - PA

Wow, great car!
Matt H. at Harwood Motors - Cleve., OH

That is a great price for such a beautiful car.
Brian G. - Australia

Safe to say that many people are drooling over this Coupe de Ville.
Bill P. - NE Ohio

Consumer Reports -- May 1955 Auto Ratings issue:
The highest ranked of the 7 cars they tested in the
"High-Priced Cars" category.

From the text of the 1955 review:
"Cadillac's gas mileage is probably the best in the group.
Cadillac's frequency-of-repair record is the best of ANY CAR.
The Cadillac is an extremely well-made automobile, with exceptionally
high resale value, and it has no serious faults."