I had no idea they were such crap quality. Thanks for clarifying guys. If I'm going to spend 10 grand on something I would expect it to be really good quality.
I was originally looking at these ones in 4G:
http://www.nvoptics.com/pvs-31c-mod.html
Where do the good ones on here come from? I'm assuming from the US? From what I understand companies in the US like TNVC have the best stuff.