One of the sports memorabilia companies in Minnesota I have done business with the longest is AME Sports. They are great about hosting a number of autograph signings throughout the hockey season, and although they don't always get the biggest names in, their prices are always cheap. One of their most recent signings took place during the NHL pre-season, and they brought in Wild defense prospect Mike Reilly, who signed an Official Game Puck that I sent in.
Reilly didn't make the regular season roster, but is working hard to get the call-up. He is currently the third highest scorer on the Iowa Wild, and the top-scoring defenseman. He grew up in the Minneapolis suburb of Chanhassen and played his college hockey at the University of Minnesota, so he has an entire city really pulling for his to make it. If he keeps going on the momentum he has built, I'm sure it'll only be a matter of time.