To the depths of 9 keys you go

Sale 1 LOW

http://backpack.tf/profiles/76561198199007643?time=1448006400&compare=1447920000 Sold for Gifted P. Fetti Coupe

Seems Low

Sale 2 OUTLIER

http://backpack.tf/profiles/76561198076788016?time=1447833600&compare=1447920000 Sold for OF Tavish

All minis for Tavish lead to it being 18 keys, which is an outlier

Sale 3

http://www.tf2outpost.com/trade/25609921 Sold for 10 keys

B/O for Elfin was 10

X = 10

Keys https://gyazo.com/df64355ee77991407c08ccc2f873ffb7 http://backpack.tf/profiles/76561198062667419?time=1445670000&compare=1447142400

Elfin http://backpack.tf/item/3343837472

Sale 4 LOL

http://backpack.tf/profiles/76561198066195760?time=1447920000&compare=1448006400 Sold for a Scrap

X = 0.11

Sale 5

[No OP Trade] Sold with 1.6 keys of sweets for Bubbling Bucket

Elfin presumed offered

X + 1.6 = 11

X = 9

Bucket http://backpack.tf/item/987497671

Elfin http://backpack.tf/item/866902798

Trade http://backpack.tf/profiles/76561198106323995?time=1446274800&compare=1446969600

Sellers

http://www.tf2outpost.com/trade/27527205 10 keys

https://gyazo.com/cbf9acb8df30320d23f7610689a3bf53 1x 9, 2x 10