I'm afraid that Costco is not selling live Christmas trees this year. They typically do not sell live trees as they prefer to focus on artificial trees, which are more convenient and easier to maintain. Additionally, Costco focuses on selling items in bulk, and live trees are not something that can be sold in large quantities. If you're looking for a live Christmas tree, I would recommend checking out your local nursery or tree farm, where they will have a wide selection of trees to choose from.