Unless the Russian has a 'New barrel' it's just 'unfired' by you. There were up to millions of either made, so the 'collector value' is mostly 'your value'. I've had both, sold the Russian after a couple years of use (got back all my $$) but now have the FT and it's an OK shooter. Still, it's an SKS so the value is the current market - up a couple Cs from what I paid last year, but now it's got almost 500 shots, so . . . ? Used are selling for $6-800 in my area, plus I have "shots fired" records and borescope vids. It was like a mirror when I bought it, and the bore still looks fine.
I'm not a 'collector', so if you have your FT 'cleaned of Cosmo' that's prob reduced the value a bit ? IDK, JMO. How long are you looking to 'Hold Your Investment' ?