Physical sales on this item: https://backpack.tf/item/2668021272

20 keys:

https://backpack.tf/profiles/76561199119484218#!/compare/1626307200/1626480000

Likely quicksold to bot, excluding:

https://backpack.tf/profiles/76561198258741427#!/compare/1627171200/1628726400

Unclear, but snapshot suggests 38 keys: https://gladiator.tf/listings/6110ba1aa5875b87c3459b59

https://backpack.tf/profiles/76561199102199351#!/compare/1628380800/1628553600

https://backpack.tf/profiles/76561198068299933#!/compare/1627862400/1628640000

Most recent SCM sales:

https://steamcommunity.com/market/pricehistory/?country=US&currency=1&appid=440&market_hash_name=Collector%27s%20Boston%20Basher

44k (higher than sellers)

26.6k

12.9k

https://steamcommunity.com/market/pricehistory/?country=US&currency=1&appid=440&market_hash_name=Collector%27s%20Professional%20Killstreak%20Boston%20Basher

14.1k

16.6k

Lower recent Pro KS sales at 14-17 suggest 27k sale might be high (in addition to 20k sale). 38k sale is pretty uncertain anyway so going to exclude.

Rounding and taking 13-17k (would welcome any opinions here).