Re-suggesting because I didn't have 1.4 key sellers, nor was I given time to correct my mistake and provide them.

Unsold at 1.7 keys. Nobody is selling for 1.6 keys.

http://www.tf2outpost.com/trade/19161911 1.7 keys. 3 days.

http://www.tf2outpost.com/trade/18893267 1.7 keys. 2 weeks. Selling 2.

http://www.tf2outpost.com/trade/19209996 1.7 keys. 21 hours.

http://www.tf2outpost.com/trade/19196422 The only 1.6 key seller. 1 day.

http://www.tf2outpost.com/trade/19172572 1.7 keys. 1 day.

http://www.tf2outpost.com/trade/19015443 1.7 keys. 1 week.

http://www.tf2outpost.com/trade/19211318 1.7 keys. 19 hours.

http://www.tf2outpost.com/trade/19204973 1.7 keys. 1 day.

http://www.tf2outpost.com/trade/18937898 1.7 keys. 1 week.

http://www.tf2outpost.com/trade/19199596 1.7 keys. 1 day.

http://www.tf2outpost.com/trade/19175406 1.7 keys. 5 days.

http://www.tf2outpost.com/trade/19194483 1.7 keys. 4 days.

http://www.tf2outpost.com/trade/18968806 1.7 keys. 2 weeks.

Selling for 1.5

http://www.tf2outpost.com/trade/19183141

http://www.tf2outpost.com/trade/19173750

http://www.tf2outpost.com/trade/19122809

http://www.tf2outpost.com/trade/19092685

http://www.tf2outpost.com/trade/19228313

http://www.tf2outpost.com/trade/19239677

http://www.tf2outpost.com/trade/19202534

http://www.tf2outpost.com/trade/19245138

http://www.tf2outpost.com/trade/19240099

http://www.tf2outpost.com/trade/19177683

http://www.tf2outpost.com/trade/19005083

Selling for 1.4

http://www.tf2outpost.com/trade/19280325

http://www.tf2outpost.com/trade/19271544

http://www.tf2outpost.com/trade/18562757

http://www.tf2outpost.com/trade/19285134 young. 14 hours

http://www.tf2outpost.com/trade/19280325 young. 19 hours.

http://www.tf2outpost.com/trade/19243213

http://www.tf2outpost.com/trade/19208442

http://www.tf2outpost.com/trade/19253404

http://www.tf2outpost.com/trade/19080025

http://www.tf2outpost.com/trade/18702363 Only one recent add that was 6 days ago. 2 in stock.

http://www.tf2outpost.com/trade/18751258 Un-bumped 1 day.

http://www.tf2outpost.com/trade/19094201 Un-bumped 1 day.

Classified Listings

http://backpack.tf/stats/Unique/All-Father/Tradable/Craftable

It isn't at all hard to find a seller at 1.5 keys, nor is it that difficult to find a 1.4 key seller.