Firstly, there are only 4 pages of sellers on tf2outpost, so I might not be able to provide absolute heaps of proof. But the requirement for a price change is pretty obvious anyways.... just take a look.

Unsold at 3 keys:

http://www.tf2outpost.com/trade/11159980 (1 day)

http://www.tf2outpost.com/trade/11109228 (2 days)

http://www.tf2outpost.com/trade/11127811 (2 days)

http://www.tf2outpost.com/trade/11102396 (2 days)

http://www.tf2outpost.com/trade/11113617 (2 days)

http://www.tf2outpost.com/trade/11074222 (3 days)

http://www.tf2outpost.com/trade/11075092 (3 days)

http://www.tf2outpost.com/trade/11048857 (4 days)

http://www.tf2outpost.com/trade/11039130 (5 days)

http://www.tf2outpost.com/trade/11005170 (6 days)

http://www.tf2outpost.com/trade/10857118 (1 week)

http://www.tf2outpost.com/trade/10932179 (1 week)

http://www.tf2outpost.com/trade/10828197 (1 week)

http://www.tf2outpost.com/trade/10964828 (1 week)

http://www.tf2outpost.com/trade/10834210 (1 week)

http://www.tf2outpost.com/trade/10816620 (1 week - 15 ref, nyeh)

http://www.tf2outpost.com/trade/10765487 (2 weeks - specified price of 3 keys in comments)

http://www.tf2outpost.com/trade/10690911 (2 weeks)

http://www.tf2outpost.com/trade/10612585 (2 weeks)

http://www.tf2outpost.com/trade/10621980 (2 weeks)

http://www.tf2outpost.com/trade/10723265 (2 weeks)

http://www.tf2outpost.com/trade/10733900 (2 weeks)

http://www.tf2outpost.com/trade/10553450 (3 weeks)

http://www.tf2outpost.com/trade/10491260 (3 weeks)

http://www.tf2outpost.com/trade/10527630 (3 weeks)

http://www.tf2outpost.com/trade/10436656 (4 weeks)

My heart goes out too those poor souls who are trying to shift these horrible things. It's just not happening, especially at 3 keys.

Unsold below 3 keys:

http://www.tf2outpost.com/trade/11179591 - 1 key 5 ref (15 hours)

http://www.tf2outpost.com/trade/11197677 - 2 keys 2.33 ref (4 hours)

http://www.tf2outpost.com/trade/11039300 - 2 keys 2.33 ref (5 days)

http://www.tf2outpost.com/trade/11193377 - 2 keys 3 ref (8 hours)

http://www.tf2outpost.com/trade/11160886 - 2 keys 3 ref (1 day)

http://www.tf2outpost.com/trade/11106228 - 2.6 keys (2 days)

http://www.tf2outpost.com/trade/11161952 - 2 keys 4 ref (1 day)

http://www.tf2outpost.com/trade/10927187 - 2 keys 4 ref (1 week)

Sold:

http://www.tf2outpost.com/trade/11175388 - 2 keys

http://www.tf2outpost.com/trade/11192552 - 2 keys 1 ref

http://www.tf2outpost.com/trade/11157956 - 2 keys 1 ref (I'm trying to verify that it actually sold for this price, bear with meh)

This massive range is horrible, so I want to bring it down to something a bit more reasonable. 3 keys is clearly wrong; 2.8 keys is too high, too. Sales tend to happen at 2-2.2 keys or lower. 2.4 keys is also a popular price for sellers. Hence the proposal of 2-2.4 keys.

End Notes:

Credit to A Distinctive Lack of Vincent for suggesting this better price range ;)

Sorry for the suggestion spam, community; hopefully, this one stays!

Thank you for reading.