Pending sales is an effort to avoid commercial scams and fraudulent purchases of user-created items involving Robux. It was officially released in September 2018 [1] and can be found under the Summary tab. and can be found under the Summary tab.
When a user makes a purchase of an item, the seller must wait three days to receive the buyer's Robux. It was promoted as a security measure, and the three-day wait time follows that of game passes and other developer products.