Roughly 100 bucks in very good condition. Not bad deal for a pocket revolver. It's defensive and if you damage it. No big deal. Ammo is pricey though 50 bucks for a 50 box so you may want to buy wadcutters.
no
Small inexpensive pistol
10-1000 usd
Seldom excees 150 USD
Never heard of a Biretta.
100-400 USD
10-1000 usd
150.00
32 short, 32 long, 32 ACP
The Mark IV was not made in .32 caliber. It was in caliber .38-200 (the 38 S&W). Value is $200 and up, depending on condition. A SIMILAR revolver is made by IOF in India in caliber .32 S&W Long, and sells new (in India) for about $1,300 USD (no competing companies).
$1000
10-90 usd