I've scoured our Northwest largest swap meet several times through the years and about 3 years ago I got one of those and I think it was about sixty bucks.. It was the only one in the swapmeet ... This last april I scoured the swap meet again and was able to find one fourteen inch... It was not in great condition but I gave him what he asked for because it was the only one... They are fundable on ebay... They are expensive but mostly a better condition...
If I had to add to that 60 bucks 3 days of scouring a large swap meet what it cost me to get it in and what it cost me to travel there and back...