Sale 1:

https://backpack.tf/profiles/76561198109359892#!/compare/1567555200/1567641600

https://backpack.tf/profiles/76561198047941585#!/compare/1567555200/1567641600

Sold with 21 keys for Orb Chullo(57.5)

Total is 36.5 keys

Sale 2:

https://backpack.tf/profiles/76561198047941585#!/compare/1567641600/1567728000

https://backpack.tf/profiles/76561198262727995#!/compare/1567641600/1567728000

Sold for Isotope Bloom FT Shotgun(30)

Sale 3:

https://backpack.tf/profiles/76561198262727995#!/compare/1567900800/1567987200

https://backpack.tf/profiles/76561198298473489#!/compare/1567900800/1567987200

Sold for P Fetti Bottle + CTFL Brass + negligible sweets

Bottle Mini:

https://backpack.tf/suggestion/5dabb86567807238c14b5b9c

Suggestion for 11.5 keys

Brass Mini:

https://backpack.tf/suggestion/5dd2136ad38172791742b567

Suggestion for 13.5 keys

Total is 24.5 keys

Sale 4:

https://backpack.tf/profiles/76561198298473489#!/compare/1568073600/1568160000

https://backpack.tf/profiles/76561198213234076#!/compare/1568073600/1568160000

Sold for CTFL Chullo + spell + ~2 keys in sweets

use there

Sale 5:

https://backpack.tf/profiles/76561198213234076#!/compare/1568332800/1568419200

https://backpack.tf/profiles/76561198087739743#!/compare/1491955200/1568419200

Keys

sale 6:

https://backpack.tf/profiles/76561198087739743#!/compare/1568419200/1568505600

https://backpack.tf/profiles/76561198280275064#!/compare/1568419200/1568505600

Sold for ~22 keys in sweets

Sale 7:

https://backpack.tf/profiles/76561198280275064#!/compare/1568419200/1568505600

https://backpack.tf/profiles/76561198074718149#!/compare/1568419200/1568505600

Untrace/ bulk

Sale 8:

https://backpack.tf/profiles/76561198074718149#!/compare/1568505600/1568592000

https://backpack.tf/profiles/76561198110010874#!/compare/1568073600/1568592000

Bulk then QS

Sale 9:

https://backpack.tf/profiles/76561198846559158#!/compare/1568851200/1568937600

https://backpack.tf/profiles/76561198002391950#!/compare/1568764800/1568937600

Sold for 21 keys

Sale 10:

https://backpack.tf/profiles/76561198002391950#!/compare/1569715200/1569801600

https://backpack.tf/profiles/76561198069265267#!/compare/1569715200/1569801600

Sold for ~21 keys

Sale 11:

https://backpack.tf/profiles/76561198069265267#!/compare/1569715200/1569801600

https://backpack.tf/profiles/76561198325595749#!/compare/1569715200/1569801600

Sold for ~24 keys

Sale 12:

https://backpack.tf/profiles/76561198325595749#!/compare/1569974400/1570060800

https://backpack.tf/profiles/76561198058073947#!/compare/1569974400/1570060800

Bulk

Sale 13:

https://backpack.tf/profiles/76561198058073947#!/compare/1572220800/1572307200

https://backpack.tf/profiles/76561198021055079#!/compare/1572220800/1572307200

Bulk

Total sales @:

21, 21, 22, 24, 24.5, 30, 36.5 keys

buyers up to 21 keys,

years unsold at 36,

2 month unsold at 30 keys,

given that 36.5 resold for lower, and 30 also resold for lower,

taking 21 - 25 keys.