Possible acquisition, advice needed

[BreakerDave]

I have been seriously thinking of getting a collector's grade Luger. (I used to own a shooter grade one, but I sold it years ago when I needed some money.) I have recently found a Luger online that fits my basic criteria (military issue, WWII years war production). The real issues now are price and condition. From what I can tell, the dealer has a good reputation. However, the price ($1800) seems to be a little high given the gun's condition. The gun I am looking at has a lot of "minor spotting" on it. The front strap, rear strap, barrel, and other points all have minor spots. The salesperson I spoke with thought the spotting would clean up with some TLC and #4 brass but if it was that easy to clean up, they'd do it themselves and charge more. I am not trying to be nasty but I have to think that they're trying to shift the risk of a making a mistake to the customer here. It's smart from a business point of view, but it makes me wonder.

What is the deal with spotting? I thought spotting would reduce the graded condition of the gun's blued finish... Can a gun with spotting still be at 95%? How much should an all matching, early WWII military Mauser with minor spotting run? Is spotting to be expected with military issue guns?

Thank you in advance for your input.

Dave