Only my assessment - re-finishing a stock, for whatever reason, does not add value, at all. Those stocks, and I have worked on two or three of my own, are birch wood, under the sprayed-on Remington finish. Despite the work and effort you put in to remove the "green", it is still an inexpensive birchwood stock. They can be extremely accurate rifles - I had one that I bedded that did multiple 1/2", 5/8" and 3/4" 5 round groups at 100 yards, with the barrel shortened to 19". It was in .243 at the time, now it wears a 22" 308 Win barrel. I had bought complete barrelled actions in 2015 and 2018 for $250 and $310, all in, mailed to me. Had bought good used barrels for $100 and stocks for about the same. So in very nice condition, in a usual and desirable chambering like your 308 Win, I would see $450 as pretty much "top dollar" - likely more if you have spare magazines going with it, or chambered in 30/30 or 44 Rem Mag. They use a #75 and #76 Weaver base to mount a scope - very inexpensive as well.