Sorry bud, did not realize another suggestion was up, but oh well, counter it is.

Sales

Sale 1: Sold for 48 keys + Shred Taunt Alert (1.45 keys)

https://backpack.tf/profiles/76561198142129821#!/compare/1600646400/1600732800

https://backpack.tf/profiles/76561198262258500#!/compare/1600646400/1600732800

https://gyazo.com/3a4ec401eb73e684e37319ad6e5c2175

48 + 1.45 = 49.45 rounding to 49 keys~

Sale 2: Sold with 3 keys for Galactic Gateway Murderer's Motif (47 keys)

https://backpack.tf/profiles/76561198220098345#!/compare/1600646400/1600732800

https://backpack.tf/profiles/76561198142129821#!/compare/1600646400/1600732800

47 - 3 = 44 keys

Murderer's Motif: https://backpack.tf/suggestion/5f75845392975a105a319ef0

Sale 3: Untrace

https://backpack.tf/profiles/76561198149792327#!/compare/1598486400/1599523200

https://backpack.tf/profiles/76561198220098345#!/compare/1599264000/1599523200

Apparently this sale was 40 keys, according to the buyer.

https://backpack.tf/suggestion/5f738ff80bc8d4066f5f1554

Marketplace sales

https://marketplace.tf/items/tf2/30091;5;u85

August

70.1 on August 15 (70.1/1.81 = 39~)

https://manic.tf/keyprice/?at=2020-08-15

https://backpack.tf/item/4260053130

Current Classifieds

https://backpack.tf/classifieds?item=Burning%20Bandana&quality=5&tradable=1&craftable=1&australium=-1&particle=85&killstreak_tier=0

https://gyazo.com/df9a341f23722345eb7d0639b4ab13db

Summary

Sales at 40 (confirmed by the buyer), 44, and 49.

Marketplace sales at 39.

Conclusion

Going with 39-49 here.

Take it easy.