+1, you could probably buy two, or more, WWII era mixmaster shooters with excellent bores for what an "excellent" 1907 all-original rifle is worth. Maybe pick up both a M1903 and an A3. But maybe that's not what you want.
By the way, just go to Google and type in "low number 1903 receivers" and you will pull up plenty of articles on the issues with the metal on those things.
This is a good article: Information On M1903 Receiver Failures