I just bought a copy of Grand Theft Auto V :D

Classified ads at the time of posting:

http://m.imgur.com/ZUlzb94

http://backpack.tf/classifieds?item=Festive+Grenade+Launcher&quality=11&tradable=1&craftable=1

1 buy order at 3.69 keys

Sold mine for 3 keys and 12 refined (~3.75 keys):

http://m.imgur.com/9NJXcWL

http://www.tf2outpost.com/trade/27219928

Seller at 3 keys and 10 refined (~3.6 keys):

http://www.tf2outpost.com/trade/27215557 (~2 days old)

Quicksale at Backpack tf price:

http://www.tf2outpost.com/trade/27208445 (Has parts, sold without a bump)

Seller at Backpack tf price:

http://www.tf2outpost.com/trade/27100976 (~2 weeks old, poorly bumped)

This is all I could find on Outpost that are valid at the time of posting this suggestion.