I know they have the old ones. I got the old $149 one for Christmas and i love them but i want to take them back and get the new ones on monster beats. com. I'm talking about the new one with a mic. that is $189. Does best buy have the new $189 ones?? What other differences does the $149 one have from the $189 dollar one?? Do they sound better? Will best buy let me take them back without a receipt?