Re: Baby Nambu
Even in that poor condition, a Baby Nambu will bring around $1500; a nice one will go for around $5k. Please do not attempt to fire or dry fire that pistol as firing pins frequently break if dry fired. Insert a dowel into the barrel and against the bolt face to act as a snap cap when you release the firing pin.
As for shooting, original 7mm ammo is running around $35 apiece on the collector market and AFAIK, no one is making any. Note that 7mm is correct; the standard military pistol was in 8mm, but the Baby Nambu was sold privately to officers and used a special 7mm round.