eBay

Still very much available on my iOS app. When you try to filter make sure you click on 'Show more' as it's an option a bit lower down the list.

Is your weight less than 1 pound? The option only shows up for me if my item weight is 16 ounces or less

One trick that will help make sure you never lose money is to have your item fully packaged with the box / envelope you plan to ship it in (don't tape it shut) and THEN weigh and measure it before you list it on the site. Sometimes a single ounce dif...