20-100 usd
50 or so
You did not say which model. The Erma-Werke KGP68, which looks like the traditional "Luger" pistol, is about $250-$500, depending on condition. If you have a different model, please repost with that information.
These retail for about $85 new.
Egunparts
no real value. depending on condition - $100 to $200
erma made alot of guns, alot under military contract to make other guns like lugers and p 38's. any differences from the luger will only be aesthetic
75 USD
50-125
50-350 usd
10-40 usd
50-125