So, I just picked a Bulgarian sneak Russian military makarov for $425 with 3 mags, holster, and extra grip. The only problem is that the finish on it is in really rough shape, almost light grey on certain spots. The question is; should re-blue the frame and slide or not? I actually have a second Bulgarian sneak Mak that is in pristine condition, so it's not like I'm looking for another safe queen.

Is it rusty or just worn?
I suggest you keep it oiled and just shoot it.
there is really no good reason to refinish most guns , a good job generally costs more than it adds in value . Possibly to return some firearm that has lots of sentimental value
back to the way it was .

If you want a shooter that looks better sell it for what you can get and buy one in better condition.

Sometimes coating a shooter will work out but mostly somewhere down the line it becomes a mess

Absolutely not.

That wear is part of the history. Do what you please, but if you ever sell it make damn sure well the buyer knows that you refinished it. It damages the collector's value.

Sell that one "as-is" for $650+ and get yourself an un-issued Bulgy Mak from SOG.  profit goes towards more Mak ammo

I really doubt I could have gotten $650 out of the gun. It only cost me $25 to refinish and the finish is the same as my other Russian. Already have an unissued Bulgarian and about 4000 rounds of ammo at $8 a box.

I think for a general shooter gun it was worth it.

Russian Sneak closed at $660+shipping