Microsoft Money Premium: $25
Microsoft Streets and Trips: $20
SideWinder Strategic Commander (input device): $15
Age of Empires III (which somehow miraculously runs on my computer): $15
Looking like a fool and getting people laughing at you for inadvertently dancing to what they were playing on the radio while you were making your purchases: priceless
There are some things money can't buy. For everything else, there's the Microsoft company store and a kick-ass staff discount.