Doesn't sell quickly at 1.8:

http://www.tf2outpost.com/trade/10552705 unsold at 1.8 keys for 1 week

http://www.tf2outpost.com/trade/10631466 unsold at 1.8 keys for 5 days

http://www.tf2outpost.com/trade/10724139 2 unsold at 1.6 keys for 1 day

Doesn't seem to sell at 2 keys at all:

http://www.tf2outpost.com/trade/9907322 unsold at 2 keys for 1 month

http://www.tf2outpost.com/trade/10266564 unsold at 2 keys for 2 weeks

http://www.tf2outpost.com/trade/10427956 unsold at 2 keys for 2 weeks

http://www.tf2outpost.com/trade/10476774 unsold at 2 keys for 1 week

http://www.tf2outpost.com/trade/10585851 unsold at 2 keys for 1 week

http://www.tf2outpost.com/trade/10647953 unsold at 2 keys for 4 days

http://www.tf2outpost.com/trade/10659731 unsold at 2 keys for 3 days

http://www.tf2outpost.com/trade/10670823 unsold at 2 keys for 3 days

http://www.tf2outpost.com/trade/10674872 unsold at 2 keys for 3 days

http://www.tf2outpost.com/trade/10675173 unsold at 2 keys for 3 days

http://www.tf2outpost.com/trade/10684228 unsold at 2 keys for 2 days

http://www.tf2outpost.com/trade/10688549 unsold at 2 keys for 2 days

http://www.tf2outpost.com/trade/10695315 unsold at 2 keys for 2 days