My first suggestion, hope i did this all right.

Anyways, this hat can't sell for 1.5 keys anymore, there are unsolds even for less.

Proof down below.

SELLING/UNSOLD:

http://backpack.tf/classifieds/search/Genuine%20That%20'70s%20Chapeau (2 at 1 key, 1 at 1.25, 3 at 1.5, the 2 keys seller is useless)

http://www.tf2outpost.com/trade/10448977 (1 key + 2 refined, 1 day)

http://www.tf2outpost.com/trade/10393073 (1 key + 1.66, 3 days)

http://www.tf2outpost.com/trade/10459919 (1 key 3 ref, 1 day)

http://www.tf2outpost.com/trade/10357349 (1 key 1 ref, 4 days)

http://www.tf2outpost.com/trade/10472506 (1 key 2 ref, 8 hours)

http://www.tf2outpost.com/trade/10190500 (1.5, 1 week)

http://www.tf2outpost.com/trade/10185760 (1 week, offer of a team captain, rejected)

http://www.tf2outpost.com/trade/9976966 (1.5 keys, 2 weeks)

BUYERS:

http://www.tf2outpost.com/trade/9951090 (2 bought at 1 key, or in items worth 1 key, claims he bought 20, i just checked comments)

http://www.tf2outpost.com/trade/8373004 (probably 1 bought for 3 ref, had 3 offers, 4 ref, 5 ref and 6 ref, all rejected)

http://www.tf2outpost.com/trade/10438070 (buying for 4 ref, one probably bought)

Please let me know what you think, all opinions are welcome.