It's usually a pain to list your goods on an auction or marketplace site, especially if it's your first time. You have to describe them, choose photos and (worst of all) choose a price that will reel in potential bidders. eBay, however, thinks it can cut the process down to a few taps. It's updating its Android and iOS apps with a simplified selling process that it claims can list a product in a matter of seconds. If you have the box for an item, you just have to scan its barcode (or, if that fails, search by name) and choose the item's condition. After that, the app can fill in a basic description, photos and even the starting price -- as elsewhere, eBay can use a mix of structured data and predictive analytics to choose a price based on what's likely to get a response.