I bought one of these 450M Apple AirPort Extreme Atheros AR5BXB112 AR9380 N card and I paid about 20 dollars US shipped. Now that are listed for 13.19 shipped from China. The card is a full PCI-e mini card but it still worked without issue and OOB in my Dell Latitude E6520 with a little packing tape to help hold it in the slot securely. I bought two more at the new price. I am putting one in my daughters D830 so that she can use wireless going forward
I recommend you pick one up for your hackbook/tosh because this airport card can run at blazing fast speeds compared to other cards.