Needs a drop.

Sold for 10 Keys and ~4 Keys in Sweets(at the time)(14 Keys total)

http://backpack.tf/profiles/76561198276175323/#!/compare/1454745600/1454832000

Sold for 11 Keys and ~7 Keys in Sweets(18 Keys total)

http://backpack.tf/profiles/76561198052485827/#!/compare/1457078400/1457164800

Sold for an Orbiting Fire Larrikin Robin(15.5 Keys) and 2 Keys(17.5 Keys total)

http://backpack.tf/profiles/76561198192602363/#!/compare/1454486400/1454572800

Sold for a Strange Rainbow Flame Thrower(Field-Tested)(~14 Keys) and ~6 Keys in Sweets(20 Keys total)

http://backpack.tf/profiles/76561198044339816/#!/compare/1454918400/1455004800

Sold for 14 Keys

http://backpack.tf/profiles/76561198197824417/#!/compare/1457510400/1457596800

Sold for 16 Keys

http://backpack.tf/profiles/76561198085342984/#!/compare/1458457200/1458543600

Strange Rainbow Flame Thrower(Field-Tested) mini suggestion

All recent sales on the SCM(Keys = $2.49): http://steamcommunity.com/market/listings/440/Strange%20Rainbow%20Flame%20Thrower%20%28Field-Tested%29

$35.00

$39.99

$33.00

$34.00

$28.58

$44.85

The sales average at $35.90(Roughly 14 Keys)

Sales seem to fit, 14-20 Keys should be fine.

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