To get specific

My friend is trying to sell me some used superbe pro cranksfor $100 (which usually go for $200 used). However, I am seeing same condition if not better omniums on CL for just a few bucks more. I'm leaning towards the omniums, but the NJS stamp... THE NJS STAMP!!!

I just want to know what to get, non NJS cranksets like miche and omniums look just as good as NJS, and I feel like I'm just paying for the NJS stamp and the craftsmanship(which doesn't necessarily mean better performance) when buying NJS stuff.

So tell me what you think, are NJS equipment really worth that much more money compared to non NJS?