What people ask on gunbroker is not necessarily the going price.
I would offer $350 (based on the description), but no more than $500.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)