If you have found a listing that you wish to follow or go back to, you can use the "Follow" function, in order to quickly find the listing again, and also receive notifications if the seller or other interested buyers post a reply on the listing.
You'll find the "Follow" button in the top right corner just above the listings picture. When you click on the button, you will automatically receive an e-mail every time a new reply is posted on the listing, and you will also be able to find the listing much faster, as it is placed in your "I Follow" view.
You'll find your "I Follow" view via My Account / listings / Open, by clicking "I follow" at the top of the screen.
Remember that you can unsubscribe all notification e-mails, and still follow the listing. If you wish to do so just click on the " Unsubscribe" button next to the listing in your "I Follow" view.