Sales

Sale 1: Sold for 11 keys

https://backpack.tf/profiles/76561198021055079#!/compare/1601510400/1601596800

https://bot.tf/stats/listings/MXE16QJP

Sale 2: Bulk

https://backpack.tf/profiles/76561198192602363#!/compare/1600819200/1600905600

https://backpack.tf/profiles/76561198217929829#!/compare/1600732800/1601078400

Sale 3: Sold for 13 keys

https://backpack.tf/profiles/76561198986177898#!/compare/1596585600/1596672000

https://backpack.tf/profiles/76561199013580821#!/compare/1596672000/1597190400

Sale 4: Sold for 10 keys, 22 refined

https://backpack.tf/profiles/76561198085340820#!/compare/1599177600/1599264000

https://backpack.tf/profiles/76561198118311164#!/compare/1599177600/1599782400

Sale rounds to 11 keys~.

Sale 5: Traced 1 key + 17 refined

https://backpack.tf/profiles/76561198269517391#!/compare/1599004800/1599177600

https://backpack.tf/profiles/76561198085340820#!/compare/1598832000/1599177600

Sale 6: Sold for 8 keys, 33 refined

https://backpack.tf/profiles/76561198191864918#!/compare/1599004800/1599177600

https://backpack.tf/profiles/76561198269517391#!/compare/1599004800/1599177600

Sale rounds to 9 keys.

Other exchanges with stn and scraptf.

https://backpack.tf/item/6763472059

Marketplace sales

https://marketplace.tf/items/tf2/30182;5;u33

Nothing recent.

Current Classifieds

https://backpack.tf/classifieds?item=L%27homme%20Burglerre&quality=5&tradable=1&craftable=1&australium=-1&particle=33&killstreak_tier=0

https://gyazo.com/d95148703530e624fdae2a6c1b0da4c6

Summary

Sales at 9, 11, 11, and 13.

Conclusion

Going with 9-13 here.

Take it easy.