I just acquired a 1957-58 Crown Graflex and was wondering what it cost new in those years. Also, what it might sell for today if they were still produced and still as popular as then.

If I recall correctly, Michael's Camera Shop in Patchogue, NY advertised a new 4 x 5 Crown Graphic at $159.95 in December 1955.
I realize this is not a direct answer but it might be the best that is available at this time.

enjoy;
C. Henry

According to the Bank of Canada inflation calculator (I'm located north of the border), $159.95 in 1955 would equal $1,368.88 in 2011. The B of C calculator is based on the cost of a "basket" of varied goods and services, so I think it's a pretty good indicator of the dwindling dollar.

http://www.cameraeccentric.com/html/info/graflex_1.html
then use
http://data.bls.gov/cgi-bin/cpicalc.pl

So the lowest price of 167.50 comes up 1588.59 and the highest price of 185.35 comes up 1757.88 .