"Without it, I won't even reply to your email or return your phone call, no matter how many times you follow up (without an offer)" So you are saying that if s

"Without it, I won't even reply to your email or return your phone call, no matter how many times you follow up (without an offer)" So you are saying that if someone wrote to you from a corporate address at General Electric ge.com you wouldn't reply to an inquiry if they didn't make an offer? And taking that one step further that person who is a serious buyer could be masking their identity behind a gmail account. I think it's a mistake not to reply to an email. Even if just to say "not for sale make offer" or whatever you want to say. Many times brokers (who have valid buyers with money) are inquiring. If they don't get a response they will move on. Just my perspective I'm a big believer in always responding.