Looks as though Banco de Mexico may be bumping up the mintages and prices after 2015. Seems the success of the 2014 7 coin set caught them off guard and it would appear the 2015 7coin set is a quick sell as well. In light of that the article indicates that the 2016 issue will have a mintage higher than the 250 sets for each of '14 and '15 in order to allow more people to have a shot.
http://world.mintnewsblog.com/2015/...icent-seven-and-other-notes-another-key-year/
http://world.mintnewsblog.com/2015/...icent-seven-and-other-notes-another-key-year/