Resuggestion, thanks to Blaze for the info!

Sale 1:

https://backpack.tf/profiles/76561198041701172#!/compare/1581811200/1583366400

https://backpack.tf/profiles/76561198192602363#!/compare/1581811200/1581897600

SCM

sale 2:

https://backpack.tf/profiles/76561198192602363#!/compare/1583971200/1584057600

https://backpack.tf/profiles/76561198264901210#!/compare/1578528000/1585612800

Sold for 20 keys

Sale 3:

https://backpack.tf/profiles/76561198856548187#!/compare/1584316800/1584403200

https://backpack.tf/profiles/76561198131081286#!/compare/1584316800/1584403200

Sold for Smoking Pillar + negligible sweets

Pillar mini:

https://backpack.tf/suggestion/5ebf3ed648848833f131d9c4

Suggestion for 12 keys

https://bot.tf/stats/listings/MLVGDOW8

B/O of 18 keys

sale 4:

https://backpack.tf/profiles/76561198131081286#!/compare/1584316800/1584403200

https://backpack.tf/profiles/76561198043621136#!/compare/1584316800/1584403200

Untrace

sale 5:

https://backpack.tf/profiles/76561198043621136#!/compare/1584576000/1584835200

https://backpack.tf/profiles/76561198816039340#!/compare/1584662400/1584835200

Sold with ~1 key in sweets for 17 keys

Total is 16 keys

sale 6:

https://backpack.tf/profiles/76561198816039340#!/compare/1585785600/1585872000

https://backpack.tf/profiles/76561198195420449#!/compare/1585785600/1585872000

Sold with negligible sweets for Aces Bare + ~1 key in sweets

use there, few sales

sale 7:

https://backpack.tf/profiles/76561198195420449#!/compare/1585872000/1585958400

https://backpack.tf/profiles/76561198324729907#!/compare/1585526400/1585958400

Sold for void Bouncer + ~5 keys in sweets + 2 spells

Sale 8:

https://backpack.tf/profiles/76561198324729907#!/compare/1585958400/1586044800

https://backpack.tf/profiles/76561198135665117#!/compare/1585958400/1586044800

Sold for 13 keys(?)

Sale 19:

https://backpack.tf/profiles/76561198135665117#!/compare/1585958400/1586044800

https://backpack.tf/profiles/76561198313360974#!/compare/1585872000/1586044800

Sold for GE Tailor

use there

sale 20:

https://backpack.tf/profiles/76561198313360974#!/compare/1586044800/1586390400

https://backpack.tf/profiles/76561198956707902#!/compare/1586304000/1586390400

Sold for GE Wing Mann

Wing mini:

https://backpack.tf/suggestion/5ebf544d47632544f162683b

Suggestion for 19 keys

sale 21:

https://backpack.tf/profiles/76561198956707902#!/compare/1586304000/1586390400

https://backpack.tf/profiles/76561198826254247#!/compare/1586304000/1586390400

Sold with 11 keys for Strange OF Mohawk

use there, few sales

sale 22:

https://backpack.tf/profiles/76561198826254247#!/compare/1586304000/1586390400

https://backpack.tf/profiles/76561198156407608#!/compare/1586304000/1586390400

Can trace some keys

sale 23:

https://backpack.tf/profiles/76561198156407608#!/compare/1586304000/1586390400

https://backpack.tf/profiles/76561198429755354#!/compare/1586217600/1586390400

Sold for ~19 keys

sale 24:

https://backpack.tf/profiles/76561198429755354#!/compare/1586563200/1586649600

https://backpack.tf/profiles/76561198131785751#!/compare/1586476800/1586563200

Sold for Searing Trans(23) + ~0.5 keys in sweets

Total is ~24 keys

Sale 25:

https://backpack.tf/profiles/76561198131785751#!/compare/1586563200/1586649600

https://backpack.tf/profiles/76561198408017461#!/compare/1586563200/1586649600

Sold for DBD Jeepcap

Jeep Mini:

https://backpack.tf/suggestion/5ebf5c6db229f53b5b604f2f

Suggestion for 14 keys

Sale 26:

https://backpack.tf/profiles/76561198408017461#!/compare/1586563200/1586649600

https://backpack.tf/profiles/76561198095022965#!/compare/1586563200/1586649600

Bulky

Total sales @:

12, 13, 14, 16, 19, 19, 20, 24 keys

buyers up to ~12 keys,

calling 13 low,

24 high,

Blaze's Part:

1 key and a soda popper skin was involved in sale 25 making it 15 keys.

Taking 15 - 20 keys.