[CR] How much when new?

Greetings all-

I've finally completed the 'refreshment' of my 1976 Motobecane Grand Record. I plan on doing a little 'show-and-tell' at our next bike club meeting. What would this bike have sold for new? And, just for comparisons sake, how about a similar vintage Schwinn Varsity and, say, a Peugeot PX10.

Thanks for any info-

George Handy in cool & windy Arlington Texas USA