To reiterate FPGT, numbers matching bolts and receivers are rare (and usually seen as dubious) in RC's, from what I understand. I bought a real nice RC a couple of years ago for around 400, and was troubled when I got it in and the numbers didn't match. But apparently, from what people more knowledgeable than I told me, Russians matched serviceable bolts to serviceable rifles after they were captured and before they were stored/exported with no concern to the serial numbers.
Also, don't buy "restored" or "refinished" rifles, if it's the history you're after. From what I've seen the unmolested rifles typically have a dark, low luster sheen to them, NOT a bright, finished look like the ones over at Mitchel's Mausers. Those rifles really have no collector value but are, from all accounts, fine shooters if you're interested in shooting instead of collecting.