I just bought 35 boxes (*16 bullets) of original german WW2 9mm ammo. 23 of them was with sealing intakt.
The price was the same as new ammo in store
I used 8 rounds and they worked just fine in my 1940 byf. A gun that usualy jams 1 out of 8 rounds..
Don't see any reason to use the rest of them, so keeping it for my collection. If any forum members are interessted in trade/buy german ammo, I might be helpfull.