I have had plenty of sellers not anwer me as well. I am not talking about making stupid offers either. I would like to suggest that you try contacting them through Audiogon. In the day of spam filters I try every way available to get ahold of them.
Doug Henning disappearing act
I've been receiving quite a few offers on gear I'm selling, only to have the would-be buyers disappear when I agree to their terms, and within 5 minutes of receiving their offers! Based upon my discussions with other sellers, this is not uncommon. Please consider whether or not you are willing to commit to the purchase PRIOR to making an offer. The integrity of this community depends upon it. Thank you.