A pal who moved out into the country also liked the Niva, so much so he got one brand new, then another, then another before getting a Daihatsu Fourtrak. The reason he went through so many in the course of eighteen months was because of faults, big faults. What I got to hear about, was the first one the radiator just one morning dropped out and he ran over it, that was just getting out of the lane where he lives to the B road. The next one, the steering wheel became diengaged from the steering arrangement, he could turn the wheel, but it wasn't altering the steering, and it eventually went upside down at the side of the road in a ditch. I never heard about the third one what happened to that, but he lost his enthusiasm for them.
He was by trade, a motor insurance engineer, so knew his stuff, the faults occurred through fatigued metal, not bolts working loose.
But of any that still exist now, the problems should be worked out, and a fine little motor they are two, basically Russia's answer to the range rover, permanent 4wd, independant suspension and a 1600 cc motor, I quite like them, but then I tend to like anything weird.