A friend of mine sort of collects Savage 99 (i.e., he can't walk by one and not buy it), and then he sets up a table @ our bi-monthly local gun show. I've spent more than a few days helping him out, and my impressions are:
1) there are 10 rifles in 300 Savage for every 1 of any other caliber;
2) you'll pay a premium for vintage 99s in other-than-300 Savage calibers;
3) many (OK, most that I've seen) in 308 Win. may not exhibit the old time craftmanship, nor the magazine window, etc., etc. That stands to reason: 308 Win came relatively late to the Sav 99 party. Most 308s I've seen have clip magazines, instead of the elegant spool type.4) those 99s from the last few years of production are a mixture of old and new parts, including mystery wood, strange finishes and sloppy tolerances.
So, of course, I couldn't resist the siren call of a late 1940's era in 300 Savage, with nice wood, brass spool magazine and counter, turned bolt, etc. It's a lovely rifle, shoots very accurately, thank you. The factory peep sight allows it to be carried as easily as a Win. 94.....and it's got more oomph.
Sold it to a native Alaska subsistence hunter who wanted to give it to his son. He'll make a third-generation Mdl 99/300 Savage hunter. I'll count that as a pretty good recommendation.