Purple Confetti Virtual Reality Headset.

Ew, decimals

Sale 1:

http://backpack.tf/profiles/76561198048571227#!/compare/1475798400/1476144000

Sold with 4 keys sweets for a Green Confetti Bubble Pipe (19, see mini below)

19 - 4 = 15

X = 15

Sale 2:

http://backpack.tf/profiles/76561198051618139#!/compare/1476316800/1476403200

Sold for a Steaming Waxy (12, indate) and ~7 keys in sweets

http://www.tf2outpost.com/trade/28538968

B/O of 14

Easily caps at B/O of 14

X = 14

Sale 3:

http://backpack.tf/profiles/76561198051618139#!/compare/1477526400/1477612800

http://imgur.com/a/L09t9 (proof of sale as compare links don't show ref)

Sold for a Aces High Stout Shako (13, see mini below), 1 key in metal and a ToD ticket (.4)

13 - 1 = 12

X = 12

Sale 4:

http://backpack.tf/profiles/76561198147292267#!/compare/1477699200/1477785600

Sold for a Dead Presidents Hot Dogger (17, indate)

X = 17

Green Confetti Bubble Pipe Mini:

http://imgur.com/a/nhk9Y

Unsold @ 19 for 5 days

X = 19

Aces High Stout Shako Mini:

http://imgur.com/a/mlBax

Seller at 12.5

X = 13 (rounded)

Sales at:

15

14

12

17

The range is big, but this kind of uncertainty is expected for a hat priced 4 years ago. Not excluding any sales here.

Final Price: 12-17 keys