Free: Contests & Raffles.
If you can find a good deal on a used NF SHV or NXS then I say go for it. I'm not convinced that the SHV is that great for the price. The 3 I've used were optically on par with a Vortex PST with usable glass but really bad edge clarity. The NXS is a good scope if you can find a deal on a used one for around $1200, but they're big and heavy if that's a concern.
I've had 2 of the SIII LR models, one 6-24x50 (which I sold with a rifle) and I still have an 8-32x56 both with the MOA-2 reticle. I also have a 3.5-10x44 with the same reticle which gets shuffled from gun to gun. I'm very happy with all of them. I think where Sightron comes up short is in the reticle department. I like the MOA-2 reticle but I would like a similar reticle in MIL with matching turrets. I'd also say that they're better targets scopes than "tactical" scopes that you're going to beat up and abuse. If you can find a good deal on a used NF SHV or NXS then I say go for it. I'm not convinced that the SHV is that great for the price. The 3 I've used were optically on par with a Vortex PST with usable glass but really bad edge clarity. The NXS is a good scope if you can find a deal on a used one for around $1200, but they're big and heavy if that's a concern. I don't know if my taste in scopes is all that good though, I still like my Mk4 ERT 8.5-25 TMR with the M5 turrets and even I'll admit that it's not that good of a scope.