Sell ​​100K diamonds/Gems in Pet Simulator 99 Delivery via mailbox or in-game trading.. Steps: 1. The seller will add the buyer's friend and must accept it 2. The seller will enter the server and the buyer will follow or join the seller 3. If you are on the same server, the trade will be carried out... *Note: sending via mailbox requires a "username" (which is used to log in to the account) not a "display name". Mistakes in writing the username and the order being lost to other people are not the seller's responsibility.