2 years outdated. Credits to A delicious cashew for providing me with the item histories.

Sale #1

http://www.tf2outpost.com/trade/21490847 b/o 2.1 buds

Sold for 38 keys pure

Backpack of seller

http://backpack.tf/profiles/76561198026462401?time=1405234800 before

http://backpack.tf/profiles/76561198026462401?time=1406508266 After

Backpack of buyer

http://backpack.tf/profiles/76561198039494892?time=1406098800 Before

http://backpack.tf/profiles/76561198039494892?time=1406444400 After

Total: 2 buds

Sale #2

http://www.tf2outpost.com/trade/21685162

Sold for Strange Professional Killstreak Festive Sniper Rifle(2 buds * 0.9 = 1.8 buds) Refer to mini suggestion + 6 keys + ~6.9 keys in sweets

Backpack of seller

http://backpack.tf/profiles/76561198039494892?time=1409209200 Before

http://backpack.tf/profiles/76561198039494892?time=1409295600 After

Backpack of buyer

http://backpack.tf/profiles/76561198049337963?time=1409209200 Before

http://backpack.tf/profiles/76561198049337963?time=1409338353 After

Total: ~2.5 buds

Sale #3

http://www.tf2outpost.com/trade/22316817

Sold for Larrikin Robin Vivid Plasma(1.4 buds * 0.9 = ~1.3 buds) + 16 keys + ~7 keys in sweets

Backpack of seller

http://backpack.tf/profiles/76561198049337963?time=1409338353 Before

http://backpack.tf/profiles/76561198049337963?time=1409468400 After

Backpack of buyer

http://backpack.tf/profiles/76561198049038677?time=1409382000 Before

http://backpack.tf/profiles/76561198049038677?time=1409468400 After

Total: ~2.5 buds

Mini suggestion

Vivid Plasma Larrikin Robin

1. http://www.tf2outpost.com/trade/22166650 Sold for Massed Flies Killer's Kabuto(1.7 buds * 0.9 = ~1.5 buds)

2. http://www.tf2outpost.com/trade/21549825 b/o 1.3 buds

A range of 1.3-1.5 buds. Taking 1.4 buds as mini suggestion price.

Strange Professional Killstreak Festive Sniper Rifle

1. http://www.tf2outpost.com/trade/22320251 Sold for Powdered Practitioner Phosphorous(1.95 buds * 0.9 = ~1.8 buds ) + ~5.4 keys in Sweets. Making this ~2.1 buds. However, seller's b/o is 2 buds. Taking 2 buds as price.

Taking 2 buds as mini suggestion price.