Sellers:

http://www.tf2outpost.com/trade/23547001 1.7 Buds, 2 Weeks unsold

http://www.tf2outpost.com/trade/23786751 1.5 Buds, young

http://www.tf2outpost.com/trade/23362546 1.3 Buds, 4 Weeks unsold

Solds:

Sold for a Smoking Gym Rat(10 Keys with Overpay), #16 Gaiter Guards(2 Keys) and Sweets around ~2.5 Keys in Sweets(14.5 Keys total, Rounding to 15)

http://backpack.tf/profiles/76561198090529595?time=1413671748 -> http://backpack.tf/profiles/76561198090529595?time=1413961200

#16 Gaiter Guards sold for 2 Keys

http://www.tf2outpost.com/trade/22925810

Sold for an Orbiting Planets Samur-Eye(1 with Overpay)

http://backpack.tf/profiles/76561198050201945?time=1413961200 -> http://backpack.tf/profiles/76561198050201945?time=1414112417

Sold for a Steaming Whoopee Cap(1 with Overpay)

http://backpack.tf/profiles/76561198050201945?time=1414047600 -> http://backpack.tf/profiles/76561198050201945?time=1414134000

All sales seem to revolve at 1 Bud, which means that 1 flat should be fine.

Additional Proof/Counter-Proof/Constructive Criticism/Feedback is always appreciated.