https://backpack.tf/profiles/76561198119967365#!/compare/1499299200/1499385600 sold for 14, countered by buyers, credits to Foamy

https://backpack.tf/profiles/76561198119629032#!/compare/1500854400/1500940800 - Tesla HWAH + 2, ~22, unknown B/O

1:1 w/ Neutron Airdog, ~20

https://backpack.tf/item/5260028768

https://backpack.tf/item/2580951405

https://backpack.tf/profiles/76561198357315076#!/compare/1500940800/1501027200 - Sold w/ ~8 keys of sweets for a Blizzardy Tower, ~17

https://backpack.tf/profiles/76561198073269221#!/compare/1501372800/1501459200 - 15 pure

https://backpack.tf/item/5845413182

http://imgur.com/a/fypGV - B/O 19, young & B/O 22, 4 months

Pretty much all of these sales were fast, but sellers suggest that they aren't actually low. With 14 countered by buyers and 22 looking high compared to the 4 month unsold (and likely B/O capped at a lower value), go with 15-20 here.