Sale 1:

Sold for 39 keys

http://www.tf2outpost.com/trade/28503207 - No Visible B/O

Seller: http://backpack.tf/profiles/76561198047573393#!/compare/1477612800/1477699200

Buyer: http://backpack.tf/profiles/76561198059866543#!/compare/1477612800/1477699200

X = 39

Sale 2:

Sold for 35 keys

No outpost

Seller: http://backpack.tf/profiles/76561197963500354#!/compare/1483401600/1483488000

Buyer: http://backpack.tf/profiles/76561198110475659#!/compare/1483315200/1483488000

X = 35

Sale 3:

Sold for 22 keys

Seller: http://backpack.tf/profiles/76561198155770318#!/compare/1482883200/1483056000

Buyer: http://backpack.tf/profiles/76561197963500354#!/compare/1482969600/1483056000

X = 22

Sale 4:

Sold with 8 keys in items for Factory New Isotope Blitzkrieg Medigun

Seller: http://backpack.tf/profiles/76561198059866543#!/compare/1477872000/1477958400

Buyer: http://backpack.tf/profiles/76561198077603108#!/compare/1477872000/1477958400

Should be used to price the medigun

Sale 5:

Sold with 30 keys + Burly Beast for Starstorm Slumber Texas Slim’s Dome Shine

Seller: http://backpack.tf/profiles/76561198077603108#!/compare/1484006400/1484092800

Buyer: http://backpack.tf/profiles/76561198160615510#!/compare/1483920000/1484092800

Can probably be used to price the dome, but it may end up being low.

Sellers:

100 keys:

http://www.tf2outpost.com/trade/28047292 – 9 months

http://backpack.tf/u/76561197961186188

Sales at:

22

35

39

22 is an outlier, and already looks really low. Excluding 22.

Going with 35-39.