Some years ago my mom gave me a 1919 2.5 peso gold Mexican coin. I was going through things the other day and came across it. Anybody know an easy way to find its value? I searched for it on ebay and found nothing which struck me as pretty unusual. I'm not a trader or collector so I was hoping to find the ballpark value without investing in books or memberships or a trip to a big city dealer. Can anyone help? Thanks!