Ron Wisner has been pretty much out of business the last three years, is heavily into excuses, is virtually 100% incommunicado, and is an exceptionally risky individual to do business with.
Ron made very, very fine cameras, including the 8x10E he made for me. He is an extremely knowledgeable person to converse with. Dealing with the man is another matter as he is long on promises but way short on business-sense.
You'll find plenty of 'skin' on Wisner within the Large Format Photography Forum.
Bruce
PS – Because of Ron's actions, Wisners can be had used at a fraction of their real value.
PSS – Wlsner ZVI cameras have not been produced for a long time.