You have to push in the firing pin on the back and slide the assembly forward. Once the assembly moves forward the top of the gun should lift off. Be careful, there are lots of small pieces and springs inside.
32 ACP
50-100
25-80
Just sold a derringer 25 Davis for $75
You need a gunsmith.
25-65 USD or so
$50 - $100. These were guns made to be cheap
50-100 USD
Whatever is available ought to be OK. (40grains.....)
$50-$90. These are not high quality, high value firearms.
no
When you reassemble the .32 make sure that all springs and small parts are exactly as you found them and when putting the top assembly back on push the firing pin back into the weapon and set down the top assembly. To insure that you have reassembled it correctly, remove the safety and dry fire the weapon.