Team Fortress 2 update enables buying items

Well, it seems that Valve has finally caved in: after offering free updates for three years after the original release of Team Fortress 2, Valve’s latest update adds a mechanism to get some revenue from the game. In particular, players will now be able to buy items which can be collected for free. The prices range from $0.50 to $5,00. Players can also trade items between each other and gift to each other. Valve has made an
official FAQ if you need more details.