Don't think these are going for 2 keys, but there are offers of 1.5, so 1 - 1.5 is a better price for now.

2 keys

http://www.tf2outpost.com/trade/8328851 - Unsold for 2 keys

http://www.tf2outpost.com/trade/8279153 - Unsold for 2 keys

http://www.tf2outpost.com/trade/8303715 - Unsold for 2 keys

http://www.tf2outpost.com/trade/8315687 - Unsold for 2 keys

http://www.tf2outpost.com/trade/8228848 - Unsold for 2 keys

http://www.tf2outpost.com/trade/8257921 - Unsold for 2 keys

http://www.tf2outpost.com/trade/8259758 - Unsold for 2 keys

http://www.tf2outpost.com/trade/8314208 - Unsold for 2 keys

1.5 keys

http://www.tf2outpost.com/trade/8316620 - Selling for 1.5 keys (offer of 4.44)

http://www.tf2outpost.com/trade/8304882 - Selling for 1.5 keys

http://www.tf2outpost.com/trade/8228848 - Offer of 1.5 keys

1 key

http://www.tf2outpost.com/trade/8335953 - Selling for 1 key

http://www.tf2outpost.com/trade/8343821 - Selling for 1 key

2 keys is unsold, possible to get at both 1 and 1.5 keys.