Head over to Big 5 on Quebec. Bring a borelight or a small maglight to check the bore. Also if you have a 7.62x54R round handy (or 7.62 of any length) to check for counterboring and/or heavy bore wear.
M/N's are clunky to begin with so don't worry if the bolt wobbles in the groove, as long as it locks in solid to the chamber, you're ok.
Biggest thing to really worry about it bore condition. Most will be worn but servicable. What you don't want is a sewerpipe where the rifling is either filled in or gone. Big 5 sells commonly found Izzy's and an occasional Tula. If you find an ex-sniper or a Finn, then you've witnessed a miracle!
I'm looking to get a new one as well. My 16 yr old took his with him when he left and it sits in a closet in Central PA.
If you decide to head over there, let me know. I might tag along if ya don't mind!
Also, for more infoon www.7.62x54r.net