400
Can't tell from the information you gave- which is that you have a .32 ACP caliber pistol made in Erfurt Germany. But if you have a DWM (Deutsche Werk und Munitionsfabriken) Pocket Automatic (similar to the FN Browning Model 1910) they were made from ABOUT 1921-1931. In good condition, about a $450-$500 pistol.
What would you like to know about this pistol? I've done quite a bit of research on these.
You need a gunsmith
when was the Deutsche werk werk erfurt 22 single made and what is the worth? I was told by a gunsmith that they were made sometime after WW1 for export to improve the trade balance for germany. They were mass produced and sold cheaply. They mostly have sentimental value. It was the first gun I ever fired when I was 6 years old. I still have it and am now aged 69.
5-100 dollars
32 ACP handgun
50-200 or so
A gunsmith can help.
25-75 USD
We call the 7.65mm the .32 ACP. Anyone who sells pistol ammo should have this. http://en.wikipedia.org/wiki/.32_ACP
0-100 USD or so