No, there are no costs associated with selling your certificates. When selling your certificates, you must first offer them to Remi & Sandra. If they do not take them over, you must offer the certificates to fellow certificate holders. If the fellow certificate holders also do not take over the certificates, you are free to offer them outside Share Council. Please note that when selling outside the platform, there may be costs such as advisory fees for you. However, the buyer must create an account on the platform.