~Zeckatz.

Sale 1: ~90 Keys.

Sold With 1 Key For Sunbeams Vintage Tyrolean (95). (B/O Was 90, https://bot.tf/stats/listings/MVLW2V3Y)

https://backpack.tf/profiles/76561198161575329#!/compare/1557360000/1557446400

https://backpack.tf/profiles/76561198050933686#!/compare/1557360000/1557446400

Sale 2: Untrace.

https://backpack.tf/profiles/76561198044897073#!/compare/1553126400/1556755200

https://backpack.tf/profiles/76561198342161127#!/compare/1553126400/1553212800

Sale 3: ~95 Keys.

Sold For Sunbeams Towering Pillar of Hats (85) + 12 Keys. (85+12=97)

B/O Was 95, https://bot.tf/stats/listings/4KE313E4

https://backpack.tf/profiles/76561198342161127#!/compare/1556841600/1556928000

https://backpack.tf/profiles/76561198178638591#!/compare/1556928000/1557014400

Sale 4: QS.

https://backpack.tf/profiles/76561198123899074#!/compare/1554508800/1554854400

https://backpack.tf/profiles/76561198044684270#!/compare/1554768000/1554854400

Sale 5: ~90 Keys Pure.

https://backpack.tf/profiles/76561198114402400#!/compare/1554768000/1554854400

https://backpack.tf/profiles/76561198211416633#!/compare/1554768000/1555027200

Sale 6: Bulk.

https://backpack.tf/profiles/76561198869144080#!/compare/1554595200/1554768000

https://backpack.tf/profiles/76561198151835897#!/compare/1553990400/1554940800

Sale 7: Use There.

Sold With 45 Keys For Bonzo The All-Gnawing Bonk Leadwear.

https://backpack.tf/profiles/76561198151835897#!/compare/1556409600/1556496000

https://backpack.tf/profiles/76561198168863803#!/compare/1556323200/1556409600

Sale 8: Untrace.

https://backpack.tf/profiles/76561198032161338#!/compare/1552867200/1553472000

https://backpack.tf/profiles/76561198002757046#!/compare/1552867200/1552953600

Sale 9: Low/Untrace.

https://backpack.tf/profiles/76561198002757046#!/compare/1553472000/1553558400

https://backpack.tf/profiles/76561198086854526#!/compare/1553472000/1553731200

Sale 10: Untrace.

https://backpack.tf/profiles/76561198086854526#!/compare/1555027200/1555286400

https://backpack.tf/profiles/76561198114876027#!/compare/1555113600/1555200000

Marketplace.tf Sales:

https://marketplace.tf/items/30977;5;u14

Sale 11: Low.

Mar 29

$84.31 / $1.79 = 47.10 keys

Sale 12: ~99 Keys.

Apr 29

$180.00 / $1.82 = 98.90 keys

Usable Sales: 90/90/95/100

Going With 90-100 Keys.