Read the introduction: http://forums.backpack.tf/index.php?/blog/121/entry-242-budget-loadouts-introduction/

Triumph on your enemies, take a sweet radioactive drink. Unusual compatible (El Jefe), plus every cosmetic can be painted.

Head: El Jefe [2.66 ref] - http://backpack.tf/stats/Unique/El%20Jefe/Tradable/Craftable

Shirt: The Little Drummer Man [3 ref] - http://backpack.tf/stats/Unique/Little%20Drummer%20Mann/Tradable/Craftable

Backpack: Caffeine Cooler [2 ref] - http://backpack.tf/stats/Unique/Caffeine%20Cooler/Tradable/Craftable

~~ 7.66 ref