How does a stormy storm hat with 10 on the market have an 8 months old price?

One b/o of 18, two b/o of 19. Highest offers of 18 keys pure. Lowest sale at 14 keys pure. Range=14-18

ACTUAL SALES

? - http://www.tf2outpost.com/trade/10018305 - sold for of stuntman but that doesn’t have a price

Offers: 15 keys (big kill at the time)

17 keys (19 keys in unusuals) http://www.tf2outpost.com/trade/9994498 - nuts pot + 3.5 keys

14 keys - http://www.tf2outpost.com/trade/9974345 - sold both for black lvl 1 max (counting this as 2 buds+1 key)

CURRENT TRADES

http://www.tf2outpost.com/trade/9916860 - B/O 20

Best Offers:

15 keys (16 in unusuals) – nuts bonnet + 3 keys

14 keys

http://www.tf2outpost.com/trade/9708052

Best Offers:

18 keys

http://www.tf2outpost.com/trade/9760535

Best Offers:

17 keys (19 in items)

http://www.tf2outpost.com/trade/10398977

Best Offer:

16 keys

http://www.tf2outpost.com/trade/9497989

Best Offer:

18 keys (20 in mixed) – 12 keys+luck 42+9 ref

http://www.tf2outpost.com/trade/10311405 - B/O 19

http://www.tf2outpost.com/trade/10254716 - B/O 18