Not sure why you are 'irritated', you asked opinions and folks gave them to you.
You paid a less than shooter price (notice what it says where I live..../ I am just north of Philly)
98% of the gun shops have very little experience with lugers, let alone a KU
I assume you go to the Allentown collectors show? I have a table there most shows, and know a bit about lugers. Geo has a table and knows a lot more than me, and there are two or three others, --Art, Scottie, Tom who know more than me...
Sooooo, I will give you $600 for it anytime this week
because as a shooter or a conversation piece, it was a steal at $500