I would need to know for a fact whether or not the game was original before throwing any money at it.Well with my SFEX copy the shyt looked, and smelled brand new I think some games are used and some are just copies never sold before
I know around where I live there's a bunch of mom and pop's selling reprints that function like the OG but the case and labels are all 3rd party joints they bought online.
I've even seen them selling hacked copies of games at a premium.
Bunch of stuff they found on aliexpress and elsewhere.
These factors definitely effect the value of the game. Otherwise I would be straight just playing the games through an emulator.