When you app, you can be given the Best Buy M/C or the Best Buy store card. Has anyone apped and was approved for the Mastercard?
BUSINESS 
Nope you can refer to my ramble about it here ( http://ficoforums.myfico.com/t5/Credit-Cards/BestBuy-Credit-Card-Knowledge-Base-APP-DEN-Info-Help-Me... ) Even though Citi is generous I believe even Citi will rarely give out those mastercards to anyone unless your in the very very high 700's and near that 800 score range. As that card is very hard to get, but even if you get it, it is not worth it at all, due to the low line of credit given out, when someone is approved for it, and the APR is no bueno. (Literally) lol. The Analyst's even recommends not getting that card, and the store card is better because you actually get to get up to 18 months of financing or 5% back in rewards, etc. vs the crappy MasterCard features and benefits [Enter them here] lol <-- None 
My Best Buy MasterCard Platinum or Gold offers 5% rewards or 0% financing too. There was a time where only the store cards provided financing but that changed sometime during fall 2012.
Well now I feel misinformed (Citi) -.- lol. Btw which one do you have; and were you instantly approve for it/ or how long did it take you to PC/app into it, did they transfer your limit over to that card, or did you have to start fresh, and if so what was your starting limit/how long did it take you to build to that limit if you don't mind me asking! (25k) 
Your scores have to be near the 800's 