If that's a Knockabout with ejectors, it sold for $175 in 1936, per my A&F catalog from that year. Per the above, Bob Beach at G&H can give you more details. I highly recommend their research services. I recently acquired a Sauer, imported just a couple years before your Francotte, and was able to learn a whole lot about it from G&H.
To give you an idea of comparative prices back then, a Parker DHE listed for $186.50 in 1936. Francottes were never inexpensive guns. They used to be pretty good buys on the used market, but prices for them have gone up significantly.
[/img]