OMG 4 months old price many have tried to change the price but main problem was the range. So here goes nothing, my turn to suggest:

Proof:

Sellers for less than 1.75keys( 1key n 4.22ref considering the price of key to be 5.66 lowend price):

http://backpack.tf/classifieds/search/id/520198c24bd7b81766000012 sold 10ref

http://backpack.tf/classifieds/search/id/5200f967ba2536a86e000005 sold 10ref

http://www.tf2outpost.com/trade/13434227 1key 2ref

http://www.tf2outpost.com/trade/13433630 1.6keys

http://www.tf2outpost.com/trade/13432216 1key 4ref

http://www.tf2outpost.com/trade/13429803 1key 2ref

http://www.tf2outpost.com/trade/13428204 1key 4ref

http://www.tf2outpost.com/trade/13427642 1key 3.66

http://www.tf2outpost.com/trade/13425360 pink painted 1:1 strange mantreads

http://www.tf2outpost.com/trade/13425347 gold painted 1:1 hornblower

http://www.tf2outpost.com/trade/13424908 10ref

http://backpack.tf/classifieds/search/id/5200b881ba25362b4100000c 1key 4ref

http://www.tf2outpost.com/trade/13417110 1key 3ref

http://www.tf2outpost.com/trade/13414572 SOLD for 1key 2ref

http://www.tf2outpost.com/trade/13414510 1key 3ref

http://www.tf2outpost.com/trade/13410590 for lord cockswain pipe+4ref

http://www.tf2outpost.com/trade/13410420 strange D.R + 2ref

http://www.tf2outpost.com/trade/13405324 key 4ref

http://www.tf2outpost.com/trade/13404192 key 4ref

http://www.tf2outpost.com/trade/13401946 1.70keys

http://www.tf2outpost.com/trade/13400872 9ref

http://www.tf2outpost.com/trade/13399323 1key 4ref

http://www.tf2outpost.com/trade/13396251 8ref

http://backpack.tf/classifieds/search/id/520009804bd7b8012600000d SOLD 10REF

http://backpack.tf/classifieds/search/id/52001e0b4bd7b85958000007 SOLD 1KEY

http://www.tf2outpost.com/trade/13395955 selling from 1key 2ref to 1key 3ref

http://www.tf2outpost.com/trade/13395728 1key 4ref

http://www.tf2outpost.com/trade/13393995 1key 3.66

http://www.tf2outpost.com/trade/13388370 1key 4ref

http://www.tf2outpost.com/trade/13386893 1key 3.66

http://www.tf2outpost.com/trade/13381119 1key 4ref

http://www.tf2outpost.com/trade/13380560 1key 4ref

Successful sellers for above 1.75keys:

http://www.tf2outpost.com/trade/13381926 delinquent for all father

http://www.tf2outpost.com/trade/13384662 1key 4.55

http://www.tf2outpost.com/trade/13393674 1key 4.55

http://www.tf2outpost.com/trade/13396739 1key 4.55

http://backpack.tf/classifieds/search/id/520066794bd7b89060000011 10.33ref

http://www.tf2outpost.com/trade/13412290 1key 4.33

http://www.tf2outpost.com/trade/13424213 1key 4.33 OR 10.33ref

MORE SUCCESSFUL SELLERS/Buyers above 1.75keys:

PROOF FROM Duscoda on the previous suggestion:

http://www.tf2outpost.com/trade/13353932 Buyer that paid a Festive Medigun (1.8-2 keys)

http://www.tf2outpost.com/trade/13365288 Buyer that paid 2 keys

http://www.tf2outpost.com/trade/13372792 Buyer that paid 2 keys

http://www.tf2outpost.com/trade/13392245 Buyer that paid 1.8 keys

http://www.tf2outpost.com/trade/13378224 Buyer that was offering a Down Vest for one (1.8-2 keys)

http://www.tf2outpost.com/trade/13376214 Buyer that paid 12 ref (slightly over 2 keys)

http://www.tf2outpost.com/trade/13366522 Buyer that paid 2 keys in items

http://www.tf2outpost.com/trade/13360481 Buyer paying a Gold BK Flamethrower Mk2 (2 keys)

http://www.tf2outpost.com/trade/13360122 Buyer that paid 10.33 ref (1.8 keys)

http://www.tf2outpost.com/trade/13354238 Was paying 2 keys in items

http://www.tf2outpost.com/trade/13349472 Was paying a Lime Anger + TC (1.8+ keys)

You see basically what I am getting at is that the price range of 1.75keys-2keys is VERY OUTDATED and old. A significant number of people selling for 1key 4ref n below but I am unsure about the new price range as keys can be from 5.66 to 5.88 now. So, 1key n 4ref is definitely lower than 1.75keys now. If anyone has a better price range, pls do suggest it in the comments below and your help will be greatly appreciated. I am keeping the 2keys in the range as it is still possible to sell it that high.

added proofs

http://www.tf2outpost.com/trade/13458489 1key 1.33

http://www.tf2outpost.com/trade/13458382 1key 3ref

http://www.tf2outpost.com/trade/13457303 1:1 horn blower

http://www.tf2outpost.com/trade/13453769 4ref lol

http://www.tf2outpost.com/trade/13450953 1key 3ref or 8ref

http://www.tf2outpost.com/trade/13450194 1key 3.66

http://www.tf2outpost.com/trade/13447867 1key 4ref