Keys recently accepted at 78.94 ref https://backpack.tf/suggestion/662c5b54c5914923560fb6ca

Past month key sales:

https://forums.backpack.tf/topic/84762-%F0%9F%94%A5%F0%9D%90%93%F0%9D%90%8E%F0%9D%90%8D%F0%9D%90%98-%F0%9D%90%81%F0%9D%90%94%F0%9D%90%98%F0%9D%90%88%F0%9D%90%8D%F0%9D%90%86-%F0%9D%90%8A%F0%9D%90%84%F0%9D%90%98%F0%9D%90%92-%F0%9D%90%85%F0%9D%90%8E%F0%9D%90%91-%F0%9D%90%8F%F0%9D%90%80%F0%9D%90%98%F0%9D%90%8F%F0%9D%90%80%F0%9D%90%8B-%F0%9D%9F%8F53-%F0%9F%94%91%C2%A0%F0%9D%9F%93-%F0%9D%90%93%F0%9D%90%91%F0%9D%90%94%F0%9D%90%92%F0%9D%90%93-%F0%9D%90%91%F0%9D%90%80%F0%9D%90%93%F0%9D%90%88%F0%9D%90%8D%F0%9D%90%86-%E2%9C%85-%F0%9D%90%84%F0%9D%90%95%F0%9D%90%84%F0%9D%90%91%F0%9D%90%98%F0%9D%90%93%F0%9D%90%87%F0%9D%90%88%F0%9D%90%8D%F0%9D%90%86-%F0%9D%90%88%F0%9D%90%8D-%F0%9D%90%8C%F0%9D%90%98-%F0%9D%90%88%F0%9D%90%8D%F0%9D%90%95%F0%9D%90%84%F0%9D%90%8D%F0%9D%90%93%F0%9D%90%8E%F0%9D%90%91%F0%9D%90%98-%F0%9D%90%88%F0%9D%90%92-%F0%9D%90%85%F0%9D%90%8E%F0%9D%90%91-%F0%9D%90%92%F0%9D%90%80%F0%9D%90%8B%F0%9D%90%84-%F0%9D%90%85%F0%9D%90%8E%F0%9D%90%91-%F0%9D%90%82%F0%9D%90%91%F0%9D%90%98%F0%9D%90%8F%F0%9D%90%93%F0%9D%90%8E/

https://backpack.tf/trust/76561198215879363

111+ keys at $1.53

$1.53 / 78.94 = $0.019

https://forums.backpack.tf/topic/68510-buying-keys-for-146-backpacks-via-paypal-600-trust-ratings%E2%9C%85/

https://backpack.tf/trust/76561198032176942

1200+ keys at $1.46

$1.46 / 78.94 = $0.018

https://forums.backpack.tf/topic/80968-%F0%9F%A6%8A-buying-backpacks-and-keys-for-145-with-paypal-zelle-cash-app-650-trust-ratings-%E2%9C%85-buying-golden-frying-pan-for-4750/

https://backpack.tf/trust/76561199183171982

8500+ keys at $1.45

$1.45 / 78.94 = $0.018

https://forums.backpack.tf/topic/76871-buying-keys-143-each-buying-backpacks-ref-tools-all-items-paypal-250-trust/

https://backpack.tf/trust/76561198031258757

54 keys at $1.43

$1.43 / 78.94 = $0.018

https://forums.backpack.tf/topic/84588-selling-keys-156-and-60-unusuals-for-great-deals-via-paypal-usdeur/

https://backpack.tf/trust/76561198045466865

385 keys at $1.56

$1.56 / 78.94 = $0.02

https://forums.backpack.tf/topic/78488-%F0%9F%97%9D%EF%B8%8Fbuying-keys-for-15-paypal-142-for-crypto-and-tods-for-06-%E2%9C%85-100-trust/

https://backpack.tf/trust/76561198306145097

969 keys at $1.5

$1.5 / 78.94 = $0.019

https://forums.backpack.tf/topic/76949-selling-keys-155-for-zelle-no-fees-venmo-no-fees-cash-app-no-fees-crypto-possibly-no-fees-no-paypal-333-rep/

https://backpack.tf/trust/76561198120347528

3300+ keys at $1.55

$1.55 / 78.94 = $0.02

https://forums.backpack.tf/topic/84656-selling-6000-keys-pure-selling-keys-for-usd-155-discount-for-bulk-buyers-500-154-paypal/

https://backpack.tf/trust/76561198066501392

867+ keys at $1.54

$1.54 / 78.94 = $0.02

https://forums.backpack.tf/topic/76054-%F0%9F%92%B2-%D1%95%CE%B9%D0%B8-is-buying-keys-145-backpacks-for-paypal-%E2%9C%94%EF%B8%8F130-trust/

https://backpack.tf/trust/76561198128838220

313 keys at $1.45

$1.45 / 78.94 = $0.018

https://forums.backpack.tf/topic/84273-gameygame6-is-buying-keys-148-paypal-buying-backpacks-with-2000-keys-and-cash/

https://backpack.tf/trust/76561198328282971

1000+ keys at $1.48

$1.48 / 78.94 = $0.019

https://forums.backpack.tf/topic/84714-buying-keys-151-usd-paypal-eu-region-prefferably-for-no-fees-will-go-first-if-you-are-reputable/

https://backpack.tf/trust/76561198040965652

1040 keys at $1.51

$1.51 / 78.94 = $0.019

https://forums.backpack.tf/topic/84795-buying-keys-backpacks-cs2-with-paypalwise-keys-146-paypal-or-wise/

https://backpack.tf/trust/76561198220098345

4400+ keys at $1.46

$1.46 / 78.94 = $0.018

https://forums.backpack.tf/topic/84768-selling-keys-154-each-usd-fast-response/

https://backpack.tf/trust/76561198120672630

100 keys at $1.54

$1.54 / 78.94 = $0.02

https://forums.backpack.tf/topic/84789-selling-50-keys-for-145-paypal/

https://backpack.tf/trust/76561199504974290

40 keys at $1.45

$1.45 / 78.94 = $0.018

https://forums.backpack.tf/topic/84226-buying-357-tf2-keys-with-paypal-15/

https://backpack.tf/trust/76561198178426383

1000+ keys at $1.5

$1.5 / 78.94 = $0.019

https://forums.backpack.tf/topic/80319-%F0%9F%92%B2covering-all-fees-%F0%9F%92%B8buying-fullpartial-tf2cs-backpacks-items%F0%9F%8E%92with-cash-paypalbank-transferwise-most-currenciescountries-availableetransfercad-bank-transfer-or-keys-buying-%F0%9F%94%91keys-for-142-usd188-cad-165-cash-trust/

https://backpack.tf/trust/76561198043858325

108 keys at $1.42

$1.42 / 78.94 = $0.018

https://forums.backpack.tf/topic/84704-selling-keys-for-155-via-zelle/

https://backpack.tf/trust/76561198799601783

330 keys at $1.55

$1.55 / 78.94 = $0.02

https://forums.backpack.tf/topic/38397-%F0%9F%9F%A2frost-is-buying-inventories-keys-for-143-crypto-139-paypal-1000-trust-ratings%E2%9C%85-no-rep-needed/

https://backpack.tf/trust/76561198061836787

1400+ keys at $1.39

$1.39 / 78.94 = $0.018

https://forums.backpack.tf/topic/84631-selling-tf2-keys-for-paypal-154/

https://backpack.tf/trust/76561198057412106

890 keys at $1.54

$1.54 / 78.94 = $0.02

Sales:

16000 @ $0.018

4000 @ $0.019

5800 @ $0.020

All three selling points seem pretty common, going with $0.018 - 0.020.