Just my 2c (after processing all sorts of inquiries during 15 years): - If I have a landing or parking page where the domain is marked as being for sale, the last question I'd like to hear would be "is the domain for sale and if so what price". Somebody is able to write but unable to read - how serious he is? - If I have a landing page with a contact form, then an inquiry made using this form has much more chances to be read and responded in timely fashion. Whois email is full of spam. - Openly disclosing the fact that an inquirer is a domainer would not help the sale in any aspect. I am sure there is no evidence anywhere that my pricing is based on user type or may be variable for college students, business startups or anybody else. - I have a bin price set, then a domainer sending an offer of about 5%-10% of showed bin would be ignored (with the "f" phrase in mind, but - in my case - not typed as a response). I see an epidemic sequence of such "offers", and, yes, from domainers, whether they disclose this fact or not. - If I have a bin sale configured through an instant-transfer marketplace, then I knowingly did so. I wish to sell the domain using fast transfer on the particular marketplace. Normal time management rules. Sometimes (more frequently domiainers) are trying to buy directly trying to save on marketplace fees. Well direct sale is not impossible, but the price would be higher and not lower. Manual processing vs automated processing - just this, nothing personal.