as "ThatOtherChigga" said, this is hard to sell.

http://backpack.tf/classifieds/search/891/11/0

one for 4.5 here, and 2 for 5

http://www.tf2outpost.com/trade/10216133

unsold for a week at 5

http://www.tf2outpost.com/trade/10545257

selling for 4.8

http://www.tf2outpost.com/trade/10532990

not selling for 15 hours at 5

http://www.tf2outpost.com/trade/10411967

unsold for 6 days at 5

http://www.tf2outpost.com/trade/10521116

1:1 with unique pink double cross, available for 4.5 here http://backpack.tf/classifieds/search/766/6/0

http://www.tf2outpost.com/trade/10474145

unsold 4.6 for 3 days

http://www.tf2outpost.com/trade/10398048

unsold for 6 days at 5 keys

http://www.tf2outpost.com/trade/10537888

willing to sell for 4.5

small market for this. Almost all sellers buy for like 1 key each, half of the sellers sell the complete set and others expect 7-8 keys