http://www.tf2outpost.com/trade/24215960 - sold for 24 keys (when buds were ~12 keys), so 2 buds total

http://www.tf2outpost.com/trade/24163111 - quicksold for 17 keys (when buds were ~12.5 keys)

http://www.tf2outpost.com/trade/25054054 - sold for orb fire goggles (~1.6) + sweets (s killstreak shotgun, merc's muffler, festive grenade + sticky - http://backpack.tf/profiles/76561198128731145?time=1425283200), so 1.8 buds total

http://www.tf2outpost.com/trade/25036105 - sold (with 1 key) for a disco prancer's pride (~1.6), so 1.4 buds total

http://www.tf2outpost.com/trade/24444661 - offered a c9 ushanka

http://www.tf2outpost.com/trade/25276787 - claims to have been offered 2 buds