I love Christmas

http://backpack.tf/item/1841718197

Sale 1) Sold + ~3 Keys of Items for an Aces High Dr's Dapper Topper (32.5 Keys)

http://backpack.tf/profiles/76561198325294399#!/compare/1492214400/1492387200 - Buyer's Backpack

32.5 - 3 = 29.5, which rounds to 30 Keys

Topper Mini

http://backpack.tf/suggestion/59447dcbe33877440a3fd509 - 32.5 Keys

Sale 2) Sold for an Orbiting Fire Neckwear Headwear (30.5 Keys)

http://backpack.tf/profiles/76561198325294399#!/compare/1492387200/1492473600

Rounding to 31 Keys

http://backpack.tf/item/2621099988

Sale 3) Sold for a Professional Killstreak Australium Flame Thrower (~24 Keys) + 3 Keys + ~1 Key of Refined

http://backpack.tf/profiles/76561198083764174#!/compare/1494028800/1494720000

24 + 3 + 1 = 28 Keys