buy it prices, $325-$450 - depending on the type and condition
these are sell prices
as it makes a difference in value - 4 inch upper, to include toggle and all parts, matching, not buffed and reblued - DWM - upper end of what Don said
WW2 - same as above - a bit more - maybe 20%
30 luger (7.65mm) drop 25%
not matching - drop 10%
buffed hard and shiny - drop 25%
Not reblued - add 25%
6 inch - add 25%
8 inch, artillery - add 25-30%
all in my opinion - so if looking to sell and make a buck, ensure you deduct 25% or more
Ed
PS: Since I have bought a few rougher or reblued complete lugers for $600-$650 - I would be hard pressed to want to spend too much, although I have 3 lowers and 3 toggles, but need uppers