The NTV was a higher end mic than the NTK. If memory serves me the NTV was around $2K and the NTK was around $1K retail when they first came out.
There is a recent Tap Op article which talks about buying the NTVs cheap and upgrading the tubes which is supposed to be the cat's meow in sound. So much so, everyone has swept them up on ebay and they are hard to find. The prices on them have also skyrocketed.
There was a time you could find them used for around $400 but no more , they go for $1000 or more these days. I'm hoping my NTK goes up in value after it is discontinued.
