Only 69 of these in existence

Sale 1

https://mannco.store/item/440-strange-red-bear-shotgun-factory-new Sold for $80 on 7/24 (around 44 keys at the time)

https://backpack.tf/item/9743129489

This is probably an outlier compared to the other sales listed below.

Sale 2

https://i.imgur.com/k6S7qHF.png Sold for clean Sunbeams Winter Woodsman (90 to 107 keys)

https://backpack.tf/item/7957535404 Woodsman

https://backpack.tf/item/9743129489 The shotgun (same as first sale)

Sale 3

https://backpack.tf/profiles/76561198110449520#!/compare/1630022400/1630108800

Sold for 91 keys pure. This sale is still less than 3 months old at time of this suggestion

Sale 4

https://backpack.tf/profiles/76561198148495750#!/compare/1625529600/1625616000

Sold for 100 keys

Sale 5

https://i.imgur.com/4TViqbb.png

Sold for 80 keys pure

https://backpack.tf/item/10707121884

Sale 6

Sold on marketplace.tf for $199.99 (199.99/1.84 = 108.69 keys) on 10/08/21

https://marketplace.tf/items/tf2/15152;11;w1;pk86;kt-3

No recent sales on community market except one sold in June 12 for $178.3 on SCM.

https://steamcommunity.com/market/pricehistory/?appid=440&market_hash_name=Strange%20Professional%20Killstreak%20Red%20Bear%20Shotgun%20%28Factory%20New%29

Range of 80-108.69 keys; rounding to 80-110 for cleanliness. Thanks to Xergoyf for an additional sale and some tips!