Poast is a marketplace app built to directly compete with Letgo, eBay, etc. The current apps in this segment are extremely popular however all very similar. Poast is built in a way that users can list products for sale at low starting bids & with control over how many "likes/swipes right" are needed prior to each auction going live. Once the listing has enough engagement, all users who Liked the Poast get a notification it's live for bidding!