Miami Nights Dr's Dapper Topper:

Sale 1:

Sold for 25 keys

http://www.tf2outpost.com/trade/27546814 - B/O of 25, buyer commented on trade

Seller: http://backpack.tf/profiles/76561198119161228/#!/compare/1450771200/1451376000

Buyer: http://backpack.tf/profiles/76561198079714270/#!/compare/1450857600/1452672000

X = 25

Sale 2:

Sold for 25 keys

No Outpost link available

Seller: http://backpack.tf/profiles/76561198086948995/#!/compare/1455091200/1455177600

Buyer: http://backpack.tf/profiles/76561198128780622/#!/compare/1455004800/1455177600

X = 25

Sale 3:

Sold for Spec. KS Australium Stickybomb Launcher

http://www.tf2outpost.com/trade/27744646 - No B/O

Seller: http://backpack.tf/profiles/76561198070150802/#!/compare/1453449600/1454227200

Buyer: http://backpack.tf/profiles/76561198162114723/#!/compare/1453449600/1453536000

X = 18

Sale 4:

Sold for Cloud 9 Hottie's Hoodie

http://www.tf2outpost.com/trade/27750787 - B/O of 25

Seller: http://backpack.tf/profiles/76561198061576062/#!/compare/1454140800/1454313600

Buyer: http://backpack.tf/profiles/76561198062537014/#!/compare/1454227200/1454313600

X = 22

The next 3 sales all occurred in 1 day, so some items may be untraceable

Sale 5:

Quicksold for 16 keys

No outpost link available

Seller: http://backpack.tf/profiles/76561198062537014/#!/compare/1454400000/1454486400

Buyer: http://backpack.tf/profiles/76561198095072235/#!/compare/1454400000/1454486400

X = 16

Sale 6:

Sold with a key for Peace Sign Sergeant's Drill Hat

http://www.tf2outpost.com/trade/27796681 - No B/O, seller confirms sale

Seller: http://backpack.tf/profiles/76561198095072235/#!/compare/1454400000/1454486400

Buyer: http://backpack.tf/profiles/76561198096703310/#!/compare/1454400000/1454486400

X + 1 = 30.5

X = 29.5

Rounding to 30

Sale 7:

According to item histories, sold with 4.5 keys in items for Dead Presidents Lucky Shot

No outpost link available

Seller: http://backpack.tf/profiles/76561198096703310/#!/compare/1454400000/1454486400

Buyer: http://backpack.tf/profiles/76561198086948995/#!/compare/1454400000/1454486400

X + 4.5 + 16

X = 11.5

Rounding to 12

Additional Sale:

Sale 8:

Not sure, probably items from other games

http://www.tf2outpost.com/trade/27617909 - No B/O

Seller: http://backpack.tf/profiles/76561198195737765/#!/compare/1451203200/1452326400

Buyer: http://backpack.tf/profiles/76561198070150802/#!/compare/1452240000/1452758400

No current sellers

Sales:

30

25 (Pure)

25 (Pure)

22

18 (Sold in a day)

16 (quicksale)

Going with the pure sales here

25 flat