Another excellent website has catalogs from various builders etc. I did not see one from 1937 specifically. If you visit the website you can review prices from the catalogs.
The 1937 catalog page below indicates that the base price was either $86 or $76 depending on the grade. The chart in figure three of the article at the link below can give you an idea of how the prices of the similar Guide model changed over time. Let me know if this doesn't answer your question.