Zen Jet Pack will make your experience with ZenArbitrage even more powerful and focused. INSTRUCTIONS: 1) YOU MUST HAVE AMAZON SELLER CENTRAL OPEN IN A SEPARATE TAB FOR THIS TO WORK CORRECTLY. 2) THE PROGRAM WILL START CROSS CHECKING EACH BOOK 30 SECONDS AFTER THE ZEN ARB PAGE LOADS. Built by a regular user of the website, Zen Jet Pack simplifies the workflow of finding books in the following ways: - Never waste time looking into a book that you can't buy anyway! - Zen Jet Pack connects to your Amazon Seller Account so you don't have to waste time clicking the "Check Restriction" for every book. - Visually see what books are promising at a quick glance! - Zen Jet Pack allows you to customize your searches highlighting books that have a favorable Used Price to FBA/AMZ price ration. - In the Extension Dropdown, you can enter a percentage you want for the Used Price in relation to the AMZ/FBA price. The default is set to 50% This feature may eventually become something Zen Arbitrage puts out themselves, but until that happens, enjoy!