The way you contact a seller is to setup a user account on our site (its free) here:

http://www.equinenow.com/account_form.htm.

Once you have an account, you can login and then browse the classifieds. When you find an ad and want to contact the seller, you'll see Contact Seller buttons on the ad, or in the lower right corner of the ad is a Contact Information tab. If you are logged in, you can fill out the contact form with your question/comment.  If you are not logged in, you will be asked for your username/password in the Contact Tab.  Once you login you can fill in your question/comment. The seller is contacted via our internal messaging system and notified of your message via email.  Some sellers also have listed their phone number in the Contact Information tab.  You can contact those sellers via telephone if you choose.