Sale 1:

Sold for Field-Tested Energy Orb Masked Mender + 5 keys

http://www.tf2outpost.com/trade/27778333 - B/O of 15

Seller: http://backpack.tf/profiles/76561198090956917#!/compare/1458111600/1458198000

Buyer: http://backpack.tf/profiles/76561198159262475#!/compare/1457938800/1458198000

I have little to no experience with unusual medi-guns, but I’d say this well and truly exceeds the B/O of 15, even without the keys.

X = 15 (Capped by B/O)

Sale 2:

Sold for 14 keys

http://www.tf2outpost.com/trade/27884563 - B/O of 14

Seller: http://backpack.tf/profiles/76561198114360955#!/compare/1460246400/1460678400

Buyer: http://backpack.tf/profiles/76561198115325995#!/compare/1460505600/1460851200

X = 14

Sale 3:

Sold for Steaming Hive Minder + Strange Pink Pyromancer’s Raiments

http://www.tf2outpost.com/trade/28141105 - B/O of 14

Seller: http://backpack.tf/profiles/76561198080179568#!/compare/1462665600/1462752000

Buyer: http://backpack.tf/profiles/76561198082245500#!/compare/1462665600/1462752000

X = 14 (Capped by B/O)

Sale 4:

Sold for Bubbling Hottie’s Hoodie

No outpost

Seller: http://backpack.tf/profiles/76561198082245500#!/compare/1462924800/1463011200

Buyer: http://backpack.tf/profiles/76561198042938501#!/compare/1462924800/1463011200

X = 13

Sale 5:

Sold for 9 keys in taunts and painted items

http://www.tf2outpost.com/trade/27073404 - B/O of 16, old outpost trade (7 months)

Seller: http://backpack.tf/profiles/76561198115325995#!/compare/1462752000/1463011200

Buyer: http://backpack.tf/profiles/76561198209357969#!/compare/1462924800/1463011200

X = 9

Sellers:

14 keys:

http://puu.sh/oYtev/0e09155eb1.png - 8 days

http://puu.sh/oYtf0/03f57d808c.png - 7 days

15 keys:

http://puu.sh/oYtfi/07cc196c4e.png

16 keys:

http://puu.sh/oYtfH/f14775570b.png - 3 months

http://www.tf2outpost.com/trade/27881518 - 2 months

Offers:

http://www.tf2outpost.com/trade/28077264

Sales at:

9

13

14

14

15

9 is a definite outlier

Going with 13-15