Buc, the 5MmBO that are potentially recoverable are worth something.
Liquid nitrogen though is industrially made from fractional distillation of liquid air by cooling and exists only at very low temperatures. There is a very large company that does this.
http://www.airliquide.com/en/company/our-businesses-our-products.html
BOC is another.
As they manufacture out of the "air that surrounds us" it would be doubtful that the nitrogen has commercial value.
http://www.airliquide.com/en/produce-gases-out-of-the-air-that-surrounds-us.html
