Marketplace.tf sales:

https://marketplace.tf/items/tf2/104;5;u60

Sale #1: $14.99 / $2.03 (https://manic.tf/keyprice/?at=2020-06-11) = 7.38 ~ 7.5 keys

Sale #2: $14.99 / $1.84 (https://manic.tf/keyprice/?at=2020-08-11) = 8.15 ~ 8 keys

Sale #3: $14.65 / $1.83 (https://manic.tf/keyprice/?at=2020-09-04) = 8.01 ~ 8 keys

Sale #4: $14.65 / $1.83 (https://manic.tf/keyprice/?at=2020-09-05) = 8.01 ~ 8 keys

All unknown item history and unknown B/O (cached on Sep 3rd shows no sell orders - http://webcache.googleusercontent.com/search?q=cache:CAwH86QfWfoJ:https://www.backpack.tf/stats/Unusual/Otolaryngologist%27s%2520Mirror/Tradable/Craftable/60&hl=en&gl=my&strip=0&vwsrc=0)

Mannco.store sale:

https://mannco.store/item/18710

Sale #5: $14.95 / $1.64 (2020-08-30 - https://mannco.store/item/1) = 9.12 ~ 9 keys

Item 1: https://backpack.tf/item/7955874795

unknown B/O.

Item tracing:

Item 1

Sale #6

untraced (individual keys tracing found no match)

https://backpack.tf/profiles/76561199081277857#!/compare/1598832000/1598918400

https://backpack.tf/profiles/76561199035016731#!/compare/1598745600/1598918400

Sale #7

untraced

https://backpack.tf/profiles/76561199035016731#!/compare/1599004800/1599350400

https://backpack.tf/profiles/76561198850121720#!/compare/1598918400/1599177600

Skipping trade between bots (Quicksell.store bots)

Item 2: https://backpack.tf/item/7957506266

Skipping trade between owner (PieDimension) and his bot (Aero ⚡ 24/7)

Sale #8

untraced, but I have the screenshot of the sale from PieDimension's Discord server: https://gyazo.com/d6b64794b0f22bf8411d7e54869dd2a1

Sold for Beep Man (~8 keys: https://backpack.tf/suggestion/5edf384cb0160029831e8d56)

https://backpack.tf/profiles/76561199043177646#!/compare/1596672000/1596758400

https://backpack.tf/profiles/76561198866418556#!/compare/1589673600/1596844800

Item 3: https://backpack.tf/item/7957087193

Sale #9

untraced

https://backpack.tf/profiles/76561198115651055#!/compare/1596240000/1596758400

https://backpack.tf/profiles/76561198358778649#!/compare/1596326400/1596412800 (missing)

Skipping deposit/withdrawal to/from marketplace.tf

Item 4: https://backpack.tf/item/7956658315

Loot.farm trade/untraced

https://backpack.tf/profiles/76561198453530349#!/compare/1596240000/1596326400

https://backpack.tf/profiles/76561198366459445#!/compare/1592092800/1597104000

----------------------------------

Current listings: https://gyazo.com/f4029a4b9d971830a7a0f813986335a2

Selling for 7.49 keys (just added, QS I guess)

Buying at highest 6.05 keys

----------------------------------

Valid sales: 7.5, 8, 8, 8, 9, 8

Taking 7.5 - 9 keys