Not really sure what those policies are to be honest.
Starting today any purchases and orders online at BestBuy.com are now limited to returns for only 15 days instead of 30 days as before.
Price Matching of other retailers happens ONLY at the time of purchase. No post purchase Price Matching. Much like Amazon. The only exception is that they will adjust a price of an item purchased if BestBuy's price drops within 15 days of the purchase and you're limited to one adjustment per item. No multiple adjustments anymore.
Silver members still get 60 days to return. Their post match price adjustment policy window is still 60 days until it closes down to 15 days as well with purchases on or after April 19, 2013.
Also be warned that their return system which logs returns through The Retail Equation will likely be more strict with limiting and denying excessive returns now that this policy has changed as well.
I give BestBuy a year before they end up the same as Circuit City.