Sale 1: Use There.

Sold For Open Mind Elf Esteem.

https://backpack.tf/profiles/76561198335791307#!/compare/1558137600/1558224000

https://backpack.tf/profiles/76561198797481842#!/compare/1558051200/1558310400

Sale 2: Untrace.

https://backpack.tf/profiles/76561198182077258#!/compare/1551571200/1561420800

https://backpack.tf/profiles/76561198047768678#!/compare/1563148800/1563408000

Sale 3: Untrace.

https://backpack.tf/profiles/76561198851076456#!/compare/1556668800/1556841600

https://backpack.tf/profiles/76561198002757046#!/compare/1556755200/1556841600

Sale 4: Untrace/Low.

https://backpack.tf/profiles/76561198002757046#!/compare/1556755200/1556841600 - 7 Keys Match.

https://backpack.tf/profiles/76561198049638059#!/compare/1556755200/1556841600

Sale 5: Using There.

Sold For Strange Purple Confetti Trucker's Topper.

https://backpack.tf/profiles/76561198049638059#!/compare/1556841600/1557014400

https://backpack.tf/profiles/76561198049989690#!/compare/1556755200/1557014400

Sale 6: Untrace.

https://backpack.tf/profiles/76561198049989690#!/compare/1557100800/1557792000

https://backpack.tf/profiles/76561197964171516#!/compare/1557705600/1557792000 - Modest doesn't match.

Sale 7: ~15 Keys.

Sold For The Dead Head (15.25)

https://backpack.tf/profiles/76561197964171516#!/compare/1559779200/1559865600

https://backpack.tf/profiles/76561198287425409#!/compare/1559692800/1559865600

Sale 8: Untrace.

https://backpack.tf/profiles/76561198287425409#!/compare/1560988800/1561075200 - 2 Keys match.

https://backpack.tf/profiles/76561198190577279#!/compare/1560902400/1560988800

Sale 9: Untrace.

https://backpack.tf/profiles/76561198190577279#!/compare/1560988800/1561075200

https://backpack.tf/profiles/76561198080179568#!/compare/1560988800/1561075200

Sale 10: Untrace.

https://backpack.tf/profiles/76561198080179568#!/compare/1563062400/1563148800

https://backpack.tf/profiles/76561198007378734#!/compare/1563148800/1563235200

https://backpack.tf/profiles/76561198007378734#!/compare/1563235200/1563321600

https://backpack.tf/profiles/76561198080179568#!/compare/1563148800/1563235200

Sale 11: ~16 Keys.

Sold With 4 Keys For Searing Plasma Punk's Pomp (27)

https://backpack.tf/profiles/76561198850003204#!/compare/1562112000/1562198400

https://backpack.tf/profiles/76561198044084333#!/compare/1561680000/1562544000

My b/o was 16 keys.

Sale 12: ~15 Keys Pure.

https://backpack.tf/profiles/76561198311725787#!/compare/1558828800/1558915200

https://backpack.tf/profiles/76561198184896141#!/compare/1558915200/1559174400

Sale 13: ~15 Keys Pure.

https://backpack.tf/profiles/76561198349886701#!/compare/1561334400/1561420800

https://backpack.tf/profiles/76561198886167680#!/compare/1561161600/1561334400

Sale 14: Untrace. (SCM)

https://backpack.tf/profiles/76561198886167680#!/compare/1561766400/1561939200

https://backpack.tf/profiles/76561198031500763#!/compare/1561075200/1562198400

Sale 15: Untrace/QS?

https://backpack.tf/profiles/76561198163326982#!/compare/1563494400/1563580800

https://backpack.tf/profiles/76561198168728832#!/compare/1563494400/1563667200

https://manic.tf/keyprice/?at=2019-06-30&price=20.00

Sale 16: ~11 Keys. (QS)

Jun 30

$20.00 / $1.84 = 10.87 keys

Sale 17: ~16 Keys.

Jul 11

$30.00 / $1.85 = 16.22 keys

Sales: 11/15/15/15/16/16

https://gyazo.com/cc39b478c3f0f882de57b5cc60b12515 - Inactive seller at 14 keys

Going with 15-16 keys for now.