tuneID.com

Question
There is techno that nearly all of us have heard, and some that it seems only have been heard by a very small crowd.

Given the number of tracks that have been denied ID's and live on in obscurity, and given the transient underground nature of many techno artists, one wonders: how much techno and related genres has been produced throughout the years?

How many releases were very local, obscure, and in very limited edition?

Anyone have an estimate?