Recently I was bit by the K98k bug, and
damn did Mitchell's Mausers (MM) seem like an awesome deal!
However, after using the search feature on a couple different forums (including this one here), I came across threads like these (
http://forums.gunboards.com/showthread.php?265453-Mitchell-s-Mausers). To say I was disappointed was an understatement.

At least my wallet was happy!
But yeah, basically from what I understand, they purchase typical Russian Capture (RC) K98ks, sand down the stock through the finish, grinds down any mismatch/force matched parts and restamps them to match, shines up the bolt to an inaccurate
"in the white" finish, and several other methods to make a RC K98k "prettier". Next, they try to pass them off as original K98ks found in storage bunkers overseas, or in a crate in a veterans attic, or other cool-sounding locations to the inexperienced/unknowing (actually heard these stories at gun-shows).
After learning that, I saved my pennies and bought a 237 code 1940 Russian Capture, which is held in much better regard to the eyes of collectors when compared to Mitchell's Mausers. Great shooter, and after cleaning the shellac off with duct-tape, looks a lot more authentic than a MM K98k, and in my opinion, much cooler. They aren't as tricky to find as you'd think, unless you're picky and what a specific code, wood type, year, etc. Shoots great, has an interesting history, as other users said they're great starter K98k's, and I got mine for a little bit less than what MM is selling his K98ks for. Just got to keep your eyes peeled and be ready for an opportunity to fall in your lap.
Hope this helps, welcome to the forum, and good luck!