There are quite a few factors to consider. I like condition as long as it is well done or original. A Navy Luger that is 100% that is an overbuff reblue (I fixed one like that) and was a High polish SALT blue is not as nice to me as a 70% real Navy, but a 90% REal Navy is even better.
If you look at Ralph's Georg Luger Baby it is in not in mint condition, but it would be my "pick of the room" for Rarity sake and history! Rarity must be tempered with absolute certainty what you are looking at is for real. A gunshow SS Luger might be rare, but it might just be a "gunshop original" too! Over all originality mixed with very good condition is tops for ol Thor!