You can get a good quality 1851 navy cap & ball replica pistol in .44 caliber for under $130 at Cabelas. I learned to shoot with .36 caliber navy nearly 40 years ago. As long as you don’t plan on any speedy reloading, it can work as a viable defense piece if one is strapped for money, or one lives in a no gun zone like Australia.
Can you obtain cap and ball revolvers easily in Australia? I understand that their gun laws are quite draconian. Spear guns have to be registered and the laws were drafted by Soros minion Rebecca Peters.