Hans,
I don't know where in TN you live, but I have seen some nice and relatively cheap (if $650-700 is cheap) shooter Lugers at the shows in Knoxville. Got a nice mismatch there not too long ago. Also found a 1944 cyq P38 in excellent condition for $500 in a local ad. It doesn't happen to me very often, but you can obviously get lucky sometimes. Just gotta have patience I guess.