Pre-bidding opens up on StockX at a minimum price bid. The highest bidders will always receive the product first.
Products are sold to the highest bidders, based on quantity. Buyers will be notified via e-mail if their bid was high enough to win and when product (or products) will ship.
Once the SPO date passes, products are shipped to buyers and can now be resold on StockX in the future as long as they remain in the same condition.