Seller here can sell or not to anyone he wants. There is no first come gets the item rule. Most go with the first come gets it but not all. Also you have to have 30 days or thirty posts that contribute to a thread before you can sell on S&S. Many here don't like someone using the forum just for the swapping and selling part. Use the forum for what it's for and get to know some of the folks here. Contribute here and there or ask a question. There is a ton of knowledge here with a lot of good people.