I know if you have a sale running, they do not show. I always see it on my listings page as long as I don't have a sale going. One other way I've done it is to go to your store on a different browser, NOT signed in and look at each listing. It usually shows at the top. Cumbersome if you have many listings. I think etsy uses it as an incentive to get people to buy if they see a lot of people have it in the cart.
