If I can't sell 2 Black/White Bill's for 2.4, there's definitely something wrong here.

Conservative drop.

Classifieds at the time of posting: http://backpack.tf/classifieds?item=Bill%27s%20Hat&quality=6&tradable=1&craftable=1

2x at 2.2 Keys

18x at 2.25 Keys(5 are painted, 1 is After Eight)(11 have auto trade)

19x at 2.3 Keys(12 are painted, 2 are Lime, 2 are Team Colors, 1 is Pink)(6 have auto trade)

32x at 2.35 Keys(27 are painted, 8 are Lime, 2 are White, 3 are Pink, 9 are Team Colors)(1 have auto trade)

17x at 2.4 Keys(all 17 are painted, 1 is White, 6 are Black, 4 are Team Colors, 1 is Pink, 2 are Lime)(2 have auto trade)

http://i.imgur.com/Ex3apKm.png 1

http://i.imgur.com/FuUcgYY.png 2

http://i.imgur.com/X5lCV1R.png 3

http://i.imgur.com/0nEfHcY.png 4

http://i.imgur.com/BghGQmy.png 5

http://i.imgur.com/KC6G6g4.png 6

http://i.imgur.com/S4QbynQ.png 7

http://i.imgur.com/AYyhyGV.png 8

http://i.imgur.com/8cOHhyo.png 9

http://i.imgur.com/OXFLAxX.png 10

Sellers at 2.2 Keys:

http://www.tf2outpost.com/trade/27370604 young

http://www.tf2outpost.com/trade/27366117 young

Sellers at 2.25 Keys:

http://www.tf2outpost.com/trade/27356930 2 Days unsold, 7 in stock(1 Painted)

http://www.tf2outpost.com/trade/27367133 young, 5 in stock(2 Painted, 1 After Eight)

http://www.tf2outpost.com/trade/27366449 young

http://www.tf2outpost.com/trade/27368242 young

Sellers at 2.3 Keys:

http://www.tf2outpost.com/trade/27309524 7 Months unsold

http://www.tf2outpost.com/trade/27370886 young, 2 in stock(1 Pink and 1 Lime)

http://www.tf2outpost.com/trade/27354121 3 Days unsold, Painted

http://www.tf2outpost.com/trade/27360584 1 Day unsold, Painted

http://www.tf2outpost.com/trade/27331603 6 Days unsold, 5 in Stock(1 Team Spirit, 1 Pink, 1 Lime)

http://www.tf2outpost.com/trade/27370370 young, Team Spirit

http://www.tf2outpost.com/trade/27370508 young, Team Spirit

http://www.tf2outpost.com/trade/27364853 1 Day unsold, Painted

http://www.tf2outpost.com/trade/27342574 4 Days unsold, Lime

http://www.tf2outpost.com/trade/27366138 young

http://bazaar.tf/trade/1402349 3 Days unsold, 2 in Stock(1 Pink, 1 Lime)

http://bazaar.tf/trade/1400446 1 Week unsold, Painted

Sellers at 2.35 Keys:

http://www.tf2outpost.com/trade/27309524 1 Week unsold

http://www.tf2outpost.com/trade/27369830 young, Black

http://www.tf2outpost.com/trade/27020031 1 Month unsold

http://www.tf2outpost.com/trade/27337157 5 Days unsold, 2 in stock(2 Painted, 1 Lime)

http://www.tf2outpost.com/trade/27310478 1 Week unsold, Lime

http://www.tf2outpost.com/trade/27358753 2 Days unsold, Value of Teamwork

http://www.tf2outpost.com/trade/27369047 young

http://www.tf2outpost.com/trade/27339430 5 Days unsold

http://www.tf2outpost.com/trade/26948516 2 Months unsold, 1 Black, 1 Lime

http://www.tf2outpost.com/trade/27369276 young, Team Spirit

http://www.tf2outpost.com/trade/27370370 young, White

http://www.tf2outpost.com/trade/27365168 1 Day unsold, Painted

http://www.tf2outpost.com/trade/27342370 4 Days unsold, Painted

http://www.tf2outpost.com/trade/27362571 1 Day unsold, White

http://www.tf2outpost.com/trade/27331020 6 Days unsold, 5 in Stock(5 Lime, 1 Team Spirit)

http://www.tf2outpost.com/trade/27352143 3 Days unsold, Team Spirit

http://www.tf2outpost.com/trade/27362437 1 Day unsold, Pink

http://www.tf2outpost.com/trade/27304790 1 Week unsold, Black

http://www.tf2outpost.com/trade/27359381 2 Days unsold, Team Spirit

Unsolds at 2.4 Keys:

http://www.tf2outpost.com/trade/27364758 1 Day unsold, Team Spirit

http://www.tf2outpost.com/trade/27360584 1 Day unsold, 6 in Stock(3 Team Spirit, 1 Lime, 2 Pink)

http://www.tf2outpost.com/trade/27339430 5 Days unsold, Painted

http://www.tf2outpost.com/trade/27366661 young, Lime

http://www.tf2outpost.com/trade/27331603 6 Days unsold, White

http://www.tf2outpost.com/trade/27347540 4 Days unsold, After Eight

http://www.tf2outpost.com/trade/27126219 1 Month unsold, Painted

It's clear that anything above 2.3 can't sell, even with paint. There are sellers at less, but they're way too young to include on the range. 2.3 Keys should be fine as a conservative drop.

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