<prompt> Human: Theres about 40 of them, all gold and all dating from the 40s or 50s. Many are from the netherlands, some from germany, and a couple large peso coins from Mexico. I dont know much about stock and just want to know how best to time when i should sell them. Thanks for any help  <response>: Get them appraised by a professional. Do not sell them at one of those we buy gold places. 