#1 17 Keys:

https://backpack.tf/profiles/76561198162322489#!/compare/1642032000/1642118400

https://backpack.tf/profiles/76561198363395191#!/compare/1642032000/1642118400

https://i.imgur.com/qpPAogh.png

#2 https://backpack.tf/profiles/76561197975933774#!/compare/1639353600/1639440000 - 12 Keys (low)

#3 https://gyazo.com/6c46af1a5204e41f065c0456b9029885 - 20 Keys

#4 https://backpack.tf/profiles/76561199177065068#!/compare/1639353600/1639440000 - 13 Keys (low)

#5 https://backpack.tf/profiles/76561198236061140#!/compare/1641945600/1642032000 - ?

#6 https://backpack.tf/profiles/76561198236061140#!/compare/1641945600/1642032000 - Sold + 2 Keys + Strange Knife for a Searing Motif

#7 https://backpack.tf/profiles/76561199121854811#!/compare/1641945600/1642032000 - Sold for a Cyprus Bronco + Amethyst Touchdown + 2 Keys

#8 https://backpack.tf/profiles/76561199121854811#!/compare/1642118400/1642204800 - Each taunt sold for 4 Keys, so that sale is too low

#9 https://backpack.tf/profiles/76561198050433855#!/compare/1642032000/1642118400 - ?

#10 https://backpack.tf/profiles/76561199109203558#!/compare/1642204800/1642291200 - ?

#11 https://backpack.tf/profiles/76561198176218038#!/compare/1635638400/1635724800 - 16 Keys

#12 https://backpack.tf/profiles/76561198061955147#!/compare/1633219200/1633564800 - ?

#13 https://backpack.tf/profiles/76561198399031554#!/compare/1641686400/1641772800 - Bulk

#14 https://backpack.tf/profiles/76561198079841650#!/compare/1641772800/1641859200 - Gambled

#15 https://backpack.tf/profiles/76561198055672922#!/compare/1641859200/1641945600 - ?

Given the Motif buyer sold this for much less, both sales can be excluded. A range of 16 - 20 Keys would work here.

going by Shuffle Spy's comment on previous suggestion, suggesting 16-20k range

Ty Shuffle Spy