credits to explocivo, scourge, blaze, and myself.

sales

Brokered-

Seller: https://backpack.tf/profiles/76561198121202767#!/compare/1590105600/1590192000

Buyer: https://backpack.tf/profiles/76561198004386287#!/compare/1589932800/1590105600

Untraceable-

Seller: https://backpack.tf/profiles/76561198004386287#!/compare/1590105600/1590710400

Buyer: https://backpack.tf/profiles/76561198337734785#!/compare/1590019200/1590105600

Possibly sold for B/O of 18 keys and 54 ref (if not, then untraceable)-

Seller: https://backpack.tf/profiles/76561198337734785#!/compare/1592524800/1592784000

Buyer: https://backpack.tf/profiles/76561198135324522#!/compare/1592524800/1592784000

B/O: https://bot.tf/stats/listings/Y80GJJ5N

20 keys

https://backpack.tf/profiles/76561198094140425#!/compare/1593216000/1593302400

https://backpack.tf/profiles/76561198380769556#!/compare/1593129600/1593302400

looks like the seller at 23 ended up selling for 20 keys and then used these keys to buy a Cloud 9 Boxcar Bomber

buyorder looks like

https://backpack.tf/profiles/76561198380769556#!/compare/1595462400/1595808000

https://backpack.tf/profiles/76561198337734785#!/compare/1595376000/1595462400

buyorder was 19~

https://bot.tf/stats/listings/4J9ENERV

buyorder looks like

https://backpack.tf/profiles/76561198052101155#!/compare/1595721600/1596153600

https://backpack.tf/profiles/76561198341171690#!/compare/1595635200/1595721600

buyorder was also 19~

https://bot.tf/stats/listings/MQ0V3OVP

sold for ge mighty mitre (24.5)

https://backpack.tf/profiles/76561198418740133#!/compare/1596672000/1596758400

https://backpack.tf/profiles/76561199059756914#!/compare/1596585600/1596672000

25~

sold for 19 keys + 11.66 ref

https://backpack.tf/profiles/76561198135324522#!/compare/1594512000/1596585600

https://backpack.tf/profiles/76561198880888642#!/compare/1596499200/1596585600

19~

was bought from qs store then resold to bot

traced 11 keys + 8.33 ref

https://backpack.tf/profiles/76561198126695508#!/compare/1596499200/1596672000

https://backpack.tf/profiles/76561198985910282#!/compare/1596585600/1596672000

buyorder was 19~

https://bot.tf/stats/listings/4EPDVJR2

untrace

https://backpack.tf/profiles/76561198321856671#!/compare/1596412800/1596672000

https://backpack.tf/profiles/76561198126695508#!/compare/1596326400/1596412800

bulky

https://backpack.tf/profiles/76561198089253101#!/compare/1596240000/1596326400

https://backpack.tf/profiles/76561198321856671#!/compare/1572825600/1596326400

bot.tf stats (i have covered the sales above, all of which were buyorders, that makes 4 @ 19~)

https://bot.tf/stats/item?def=984&q=5&ef=Kill-a-Watt&craft=1&aus=0&ks=0&source=browser_script

https://gyazo.com/a8abbaa2cb968f9f9fa2c92208de8d44

mptf

https://marketplace.tf/items/tf2/984;5;u56

$34.37 / $1.92 = 17.90 keys

https://manic.tf/keyprice/?at=2020-05-27

$48 / $1.94 = 24.74 keys

https://manic.tf/keyprice/?at=2020-06-02

classies

https://gyazo.com/90216ba5f8e2362ee7d3ddadade4ee8d

summary

sales are at 18, 19, 19, 19, 19, 20, 25, and 25.

conclusion

18 was quicksold. 25 seems somewhat high due to current sellers.

all 19 were to buyorders, but 4 sales makes it common.

going with 19-20 here.