$150 in 2007 would be $30.43 in 1972 $150 in 2007 would be $37.06 in 1975 $150 in 2007 would be $45.55 in 1978
(the inflation rate of 2008 was 0.1%, roughly zero.)
source: http://www.westegg.com/
So the modern price might not be "all the out of line" with the vintage price for these tubulars, which I understood were always in the $30-$45 range 'back in the day'.
- Don Gillies
San Diego, CA, USA