Hi, A dealer is selling the nice proof Gold Buffalo coins dated 2009, 2010, 2015, all are in the beautiful wooden box (seen below). Price is around 1,600 USD for the 2009 and 2010 versions, but for some reason the 2015 variant costs 1995 USD!!! I'm eyeing the 2009, 2010 versions, just because they're beautiful. What do you think? Is this a good buy?