This price is very outdated, to confirm why it should be 1 scrap each, I will provide links to both 2 scrap trades, and 1 scrap trades to show the interest, and demand in the item. This is my first suggestion so if I made a mistake let me know, thanks!

The Hair of the Dog for 1 scrap (Longest to Shortest Period of time since creation of trade):

http://www.tf2outpost.com/trade/6444076

(Selling 3 Hair of the Dog's for 1 scrap each, none sold after 2 weeks)

http://www.tf2outpost.com/trade/6403793

(Hair of the Dog for 1 scrap, unsold after 2 weeks)

http://www.tf2outpost.com/trade/6700257

(Hair of the Dog for 1 scrap, unsold after 5 days)

http://www.tf2outpost.com/trade/6744803

(Offers a hair of the dog, scottish snarl and pickled paws for 2 scrap, only 2 sets sold in 3 days)

http://www.tf2outpost.com/trade/6785765

(Hair of the Dog for 1 scrap, unsold after a day)

The Hair of the Dog for 2 scrap (Longest to Shortest Period of time since creation of trade):

http://www.tf2outpost.com/trade/6090791

(Hair of the Dog for 2 scrap, unsold after 3 weeks)

http://www.tf2outpost.com/trade/6478464

(Hair of the Dog for 2 scrap, unsold after 2 weeks)

http://www.tf2outpost.com/trade/6444076

(Hair of the Dog for 2 scrap, unsold after 1 week)

http://www.tf2outpost.com/trade/6692562

(Hair of the Dog for 2 scrap, unsold after 5 days)

http://www.tf2outpost.com/trade/6705158

(Hair of the Dog for 2 scrap, unsold after 4 days)