Have you checked "Perfectunion"? This is the Mini 14/30 website.
Be aware that quite often posters don't state whether their comments regard the 14 or the 30 (7.62x39).
Many posters assume that people only have the 14.
One problem with Mini 30s is that using Russian ammo results in some ftfs on the first strike. With my 30 (built in '03), it is only now and then. My old ('90) Mini 14 never had any ftf, and both my 30 and 14 only use Wolf ammo. Russian ammo has harder primers than the far over-priced US ammo.
The problem with the old (some reliable, many useless) aftermarket mags has been mostly solved, as Ruger now sells Ruger 20-rd. mags for both the 14 and 30.
On Perfectunion, the number 30 can mean 30-rounds, or the Mini 30, which confuses many topics even more. You might need to read quite a bit in order to sort things out, and make an informed decision.
One thing seems to stand out consistently at gun shows and in gun shops: a used Mini 14 is much easier to sell than a used Mini 30.