Amazingly, despite the very short trigger moving distance, the trigger pull on Luger is not as light as it looks. I have not gotten a trigger pull gauge to measure the value yet.
Searching "Interarms Mauser" on gunbroker.com. At this moment, I saw one:
http://www.gunbroker.com/Auction/Vie...Item=152763483
Or, post a WTB ad in the forum, with condition, price range specified.
If 7,65 can be considered as well, here is a good DWM made in 1920s:
http://www.gunbroker.com/Auction/Vie...Item=153374794