Some available for less than 1 key:

http://www.tf2outpost.com/trade/10674758 unsold at 5 refined for 1 week

http://www.tf2outpost.com/trade/11043196 unsold at 5 refined

http://backpack.tf/classifieds/search/524/1/0 2 unsold at 4.66 refined

http://www.tf2outpost.com/trade/11028700 unsold at 4.66 refined

Doesn't sell at 1 key in a reasonable amount of time:

http://www.tf2outpost.com/trade/9744900 unsold at 1 key for 1 month

http://www.tf2outpost.com/trade/9862214 unsold at 1 key for 1 month

http://www.tf2outpost.com/trade/10350364 unsold at 1 key for 3 weeks

http://www.tf2outpost.com/trade/10358209 unsold at 1 key for 3 weeks

http://www.tf2outpost.com/trade/10419303 unsold at 1 key for 3 weeks

http://www.tf2outpost.com/trade/10459344 unsold at 1 key for 3 weeks

http://www.tf2outpost.com/trade/10592693 unsold at 1 key for 2 weeks

http://www.tf2outpost.com/trade/10670802 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10676108 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10714059 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10729241 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10760448 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10761129 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10765079 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10782472 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10795610 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10805209 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10806354 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10819959 unsold at 1 key for 1 week

http://www.tf2outpost.com/trade/10825645 unsold at 1 key for 6 days

http://www.tf2outpost.com/trade/10837370 unsold at 1 key for 6 days

http://www.tf2outpost.com/trade/10848374 unsold at 1 key for 5 days

http://www.tf2outpost.com/trade/10854035 unsold at 1 key for 5 days

http://www.tf2outpost.com/trade/10860037 3 unsold at 1 key for 5 days

http://www.tf2outpost.com/trade/10866033 unsold at 1 key for 5 days

http://www.tf2outpost.com/trade/10868950 unsold at 1 key for 5 days

http://www.tf2outpost.com/trade/10869364 unsold at 1 key for 5 days

http://www.tf2outpost.com/trade/10869408 unsold at 1 key for 5 days

http://www.tf2outpost.com/trade/10869521 unsold at 1 key for 5 days

http://www.tf2outpost.com/trade/10876704 unsold at 1 key for 4 days

http://www.tf2outpost.com/trade/10888769 unsold at 1 key for 4 days

http://www.tf2outpost.com/trade/10917351 unsold at 1 key for 4 days

http://www.tf2outpost.com/trade/10921073 unsold at 1 key for 4 days

http://www.tf2outpost.com/trade/10948439 unsold at 1 key for 3 days

http://www.tf2outpost.com/trade/10950507 unsold at 1 key for 3 days

http://www.tf2outpost.com/trade/10951206 unsold at 1 key for 3 days

http://www.tf2outpost.com/trade/10952498 unsold at 1 key for 3 days

http://www.tf2outpost.com/trade/10964953 unsold at 1 key for 3 days

http://backpack.tf/classifieds/search/524/1/0 7 unsold at 1 key for up to 4 days

More unsold at 1 key:

http://www.tf2outpost.com/trade/10981121 unsold at 1 key for 2 days

http://www.tf2outpost.com/trade/10981512 unsold at 1 key for 2 days

http://www.tf2outpost.com/trade/10994528 unsold at 1 key for 2 days

http://www.tf2outpost.com/trade/10994744 unsold at 1 key for 2 days

http://www.tf2outpost.com/trade/10997955 unsold at 1 key for 2 days

http://www.tf2outpost.com/trade/10999679 unsold at 1 key

http://www.tf2outpost.com/trade/11000775 unsold at 1 key

http://www.tf2outpost.com/trade/11005547 unsold at 1 key

http://www.tf2outpost.com/trade/11007187 unsold at 1 key

http://www.tf2outpost.com/trade/11007880 unsold at 1 key

http://www.tf2outpost.com/trade/11008399 unsold at 1 key

http://www.tf2outpost.com/trade/11046126 unsold at 1 key

http://www.tf2outpost.com/trade/11047245 unsold at 1 key

http://www.tf2outpost.com/trade/11050603 unsold at 1 key

http://www.tf2outpost.com/trade/11052110 unsold at 1 key

http://www.tf2outpost.com/trade/11056224 unsold at 1 key

http://www.tf2outpost.com/trade/11056416 unsold at 1 key