Just have to do this.

Unsolds at 1 key

http://www.tf2outpost.com/trade/22695591

http://www.tf2outpost.com/trade/22754406

http://www.tf2outpost.com/trade/22790228

http://www.tf2outpost.com/trade/22646069

http://www.tf2outpost.com/trade/22520783

http://www.tf2outpost.com/trade/22758661

http://www.tf2outpost.com/trade/22810193

http://www.tf2outpost.com/trade/22814572

http://www.tf2outpost.com/trade/22759896

http://www.tf2outpost.com/trade/22553980

http://www.tf2outpost.com/trade/22763351

http://www.tf2outpost.com/trade/22518664

Unsolds at 8.33 ref

http://www.tf2outpost.com/trade/22806916

http://www.tf2outpost.com/trade/22748467

Selling/ Sold for 8 ref

http://www.tf2outpost.com/trade/22820642

http://www.tf2outpost.com/trade/22621329

http://www.tf2outpost.com/trade/22823820

http://www.trade.tf/trade/482066973

http://www.trade.tf/trade/482106253

http://www.trade.tf/trade/482142290

http://www.trade.tf/trade/482133948

Selling/ Sold for 7.88 ref

http://www.tf2outpost.com/trade/22754092

http://www.trade.tf/trade/482126150

Selling/ Sold for 7.77 ref

http://www.tf2outpost.com/trade/22834301

http://www.tf2outpost.com/trade/22834181

Selling/ Sold for 7.66 ref

http://www.tf2outpost.com/trade/22815611

http://www.trade.tf/trade/481957404

http://www.trade.tf/trade/482078648

http://www.trade.tf/trade/482082823

http://www.trade.tf/trade/482088656

http://www.trade.tf/trade/482131013

Selling/ Sold for 7.55 ref

http://www.trade.tf/trade/482136601

Selling/ Sold for 7.33 ref

http://www.tf2outpost.com/trade/22829026

http://www.tf2outpost.com/trade/21729790

Selling/ Sold for 7 ref

http://www.tf2outpost.com/trade/22828976

http://www.trade.tf/trade/482103445

http://www.trade.tf/trade/482098761

Conclusion: Sales happened at every price other than 1 key. 1 key just doesn't sell at all and it seems that 7.66 - 8 ref is much more common.

Feel free to counter / support my proofs.