We are only allowed to have 5 mossy oak trees at a time. Do you have any on the board or in inventory? If so, you must completely chop one or more before you can purchase any additional trees. If you have no mossy oak trees, and still cannot buy them, then I recommend sending a message to support along with a private message to Pika or SW to try to expedite it. Keep in mind that we are in the middle of a holiday weekend, so response times may be slow.