Browning, FN, and Inglis really describe different products. I assume you are referring to the Inglis version of the FN P35 pistol. Inglis, in Canada, did not begin manufacture until 1940 with 100% of production going to military channels. There would not really be a 'retail' price. The FN-manufactured 'Browning Hi-Power' commercial pistol was not introduced to the US market until 1955. Pistols sold before then would have been FN commercial pistols or surplused military pistols imported through secondary channels.
100 USD give or take.
A handgun
a Handgun
$100,000,000
Better to contact Browning at browning.com
1961
yes
Go to Browning.com
They refer to this handgun as the browning model BDA (browning double action auto) pistol.
Value is too difficult to be accurate without seeing the gun. Condition which includes the amount of original finish and original configuration will determine value. Recommend taking it to a gun shop for appraisal.
Contact Browning. They offer historical letters.
See link.