Resuggestion, thanks to Shuffle Spy for the info!

Sale 1:

https://backpack.tf/profiles/76561198123441069#!/compare/1586217600/1586304000

https://backpack.tf/profiles/76561197971654911#!/compare/1582588800/1586390400

Sold for 52 keys

sale 2:

https://backpack.tf/profiles/76561197971654911#!/compare/1586649600/1586908800

https://backpack.tf/profiles/76561198171672427#!/compare/1586736000/1586822400

https://backpack.tf/profiles/76561198037674114#!/compare/1586217600/1586908800

https://backpack.tf/profiles/76561198020673987#!/compare/1587081600/1587254400

https://backpack.tf/profiles/76561198850274253#!/compare/1587859200/1587945600

Untrace / QS

sale 3:

https://backpack.tf/profiles/76561198159317851#!/compare/1583193600/1583366400

https://backpack.tf/profiles/76561198305494036#!/compare/1583280000/1583366400

QS

sale 4:

https://backpack.tf/profiles/76561198305494036#!/compare/1583452800/1583539200

https://backpack.tf/profiles/76561198131081286#!/compare/1583452800/1583539200

sold for 46 keys

sale 5:

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

https://backpack.tf/profiles/76561198255187641#!/compare/1584403200/1584489600

Sold for PE Noble + 15 keys

Noble Mini:

https://backpack.tf/suggestion/5ec37ced547f1920ae2b7342

Suggestion for 40 keys

Total is 55 keys

https://bot.tf/stats/listings/4KV5KGX0

B/O of 70 keys

sale 6:

https://backpack.tf/profiles/76561198255187641#!/compare/1584489600/1584662400

https://backpack.tf/profiles/76561198146046621#!/compare/1584576000/1584662400

Sold with ~4 keys in sweets for Warp Counterfeit

used there

sale 7:

https://backpack.tf/profiles/76561198146046621#!/compare/1584576000/1584662400

https://backpack.tf/profiles/76561198072999396#!/compare/1584576000/1584662400

Sold for 48 keys

sale 8:

https://backpack.tf/profiles/76561198072999396#!/compare/1585008000/1585094400

https://backpack.tf/profiles/76561198158248076#!/compare/1585008000/1585094400

Sold for Orb Peak

Peak Mini:

https://backpack.tf/suggestion/5ec333f01ea6e57e3f19071c

Suggestion for 62.5 keys

https://bot.tf/stats/listings/Y3W5XZ11

B/O of 120 keys

sale 9:

https://backpack.tf/profiles/76561198057897812#!/compare/1581897600/1581984000

https://backpack.tf/profiles/76561198314349856#!/compare/1581897600/1581984000

Sold with negligible sweets for 48 keys

sale 10:

https://backpack.tf/profiles/76561198314349856#!/compare/1582243200/1582070400

https://backpack.tf/profiles/76561198127328235#!/compare/1581724800/1582243200

Sold with ~5 keys in sweets for SBTWC Counterfeit

Counter Mini:

https://backpack.tf/suggestion/5ec37b68994a5a693a67d5bf

Suggestion for 65.5 keys

Total is 60.5 keys

https://bot.tf/stats/listings/4JGV8PEP

B/O of 69 keys

Sale 11:

https://backpack.tf/profiles/76561198127328235#!/compare/1582243200/1582329600

https://backpack.tf/profiles/76561198209640976#!/compare/1582243200/1582329600

Sold for Cool Star Crossed FT RL + ~14 keys in sweets

use there, only sale

https://bot.tf/stats/listings/4KRKE6W1

B/O of 69 keys

Sale 12:

https://backpack.tf/profiles/76561198209640976#!/compare/1583798400/1583884800

https://backpack.tf/profiles/76561198819747735#!/compare/1583798400/1583884800

Sold for Strange Miami MW Scatter + 10 keys

use there, few sales

https://bot.tf/stats/listings/Y796LQVW

B/O of 52 keys

sale 13:

https://marketplace.tf/items/tf2/30006;5;u14

$70 / $1.69 = 41.42 keys <---- buy order

total sales @:

46, 48, 48, 52, 55, 61, 63 keys

buyers up to 49 keys,

https://bot.tf/stats/listings/4KV1DO5X

note that buyers are somewhat new,

let's hazard 48 - 61 keys.

Shuffle's Part:

The IDs and histories don't match for the first sale (52). Given Buyers are now creeping up to 53 Keys, I'd go 55 - 61 Keys here.