Ballpark Gear Ratio

So who sells a good (street) ring and pinion these days? It's been 20 years since I bought gears. I'm going with 4.30's.

It looks like Ratech has the installation stuff (bearings, etc.). I'm getting their pinion depth tool, reusable gasket, and solid spacer, too.
Ratech

I see Randy's and Moser are priced 3-400. Then I see Motive and US Gear for about 250-300.

I guess there's even Chinese junk in the equation now? I see no-name gears for 100-150 on Amazon.