Item 1: https://backpack.tf/item/10773306453

Sale 1:

https://backpack.tf/profiles/76561198393866042#!/compare/1771027200/1771113600

https://backpack.tf/profiles/76561199550301253#!/compare/1771027200/1771113600

Dumped to a Dolphin bot for 4 keys 49.33 ref (4.91 keys, ~5 keys)

Sale 2:

https://backpack.tf/profiles/76561199550301253#!/compare/1771200000/1771286400

https://backpack.tf/profiles/76561198174445859#!/compare/1770940800/1771286400

6 keys

Item 2: https://backpack.tf/item/10768039639

Sale 3:

https://backpack.tf/profiles/76561199017959799#!/compare/1768003200/1768262400

https://backpack.tf/profiles/76561199889987676#!/compare/1768003200/1768262400

Most likely gambling

Sale 4:

https://backpack.tf/profiles/76561199889987676#!/compare/1768003200/1768262400

https://backpack.tf/profiles/76561199017959799#!/compare/1768262400/1768348800

Bulk/gambling

Sale 5:

https://backpack.tf/profiles/76561199017959799#!/compare/1769817600/1769904000

https://backpack.tf/profiles/76561198414515070#!/compare/1769817600/1769904000

Untrace/gambling

Sale 6:

https://backpack.tf/profiles/76561198414515070#!/compare/1769817600/1769904000

https://backpack.tf/profiles/76561199017959799#!/compare/1769904000/1769990400

Untrace/gambling

Sale 7:

https://backpack.tf/profiles/76561199017959799#!/compare/1770681600/1770768000

https://backpack.tf/profiles/76561198144722596#!/compare/1770508800/1770768000

Untrace/gambling

Sale 8:

https://backpack.tf/profiles/76561198144722596#!/compare/1770508800/1770768000

https://backpack.tf/profiles/76561199017959799#!/compare/1770681600/1770768000

Untrace/gambling

Sale 9:

https://backpack.tf/profiles/76561199017959799#!/compare/1773878400/1773964800

https://backpack.tf/profiles/76561198346535845#!/compare/1736985600/1773964800

Untrace/gambling

Sale 10:

https://backpack.tf/profiles/76561198346535845#!/compare/1736985600/1773964800

https://backpack.tf/profiles/76561198162800708#!/compare/1773619200/1773964800

Bulk/gambling

Item 3: https://backpack.tf/item/10010723126

Sale 11:

https://backpack.tf/profiles/76561199263072239#!/compare/1766534400/1766620800

https://backpack.tf/profiles/76561199059800460#!/compare/1766534400/1766620800

Dumped to Quicksell.Store for 4 keys 41.44 ref (4.76 keys, ~5 keys)

Sale 12:

https://backpack.tf/profiles/76561199059800460#!/compare/1766620800/1766707200

https://backpack.tf/profiles/76561199446578917#!/compare/1767312000/1768089600

Untrace/Bulk

Sale 13:

https://backpack.tf/profiles/76561199446578917#!/compare/1768089600/1768262400

https://backpack.tf/profiles/76561199017959799#!/compare/1768262400/1768348800

Bulk/gambling

Sale 14:

https://backpack.tf/profiles/76561199017959799#!/compare/1769817600/1769904000

https://backpack.tf/profiles/76561198414515070#!/compare/1769817600/1769904000

Untrace/gambling

Sale 15:

https://backpack.tf/profiles/76561198414515070#!/compare/1769817600/1769904000

https://backpack.tf/profiles/76561199017959799#!/compare/1769817600/1769904000

Untrace/gambling

Sale 16:

https://backpack.tf/profiles/76561199017959799#!/compare/1773878400/1773964800

https://backpack.tf/profiles/76561198135471163#!/compare/1773878400/1773964800

Untrace/gambling

Sale 17:

https://backpack.tf/profiles/76561198135471163#!/compare/1773964800/1774051200

https://backpack.tf/profiles/76561199017959799#!/compare/1773964800/1774051200

Untrace/gambling

Item 4: https://backpack.tf/item/9538708648

Listed on MPTF

Item 5 (hidden but I found it while looking at another compare) https://backpack.tf/item/9573034379

Sale 18:

https://backpack.tf/profiles/76561199017959799#!/compare/1768003200/1768262400

https://backpack.tf/profiles/76561199889987676#!/compare/1768003200/1768262400

Untrace/gambling

Sale 19:

https://backpack.tf/profiles/76561199889987676#!/compare/1768003200/1768262400

https://backpack.tf/profiles/76561199017959799#!/compare/1768003200/1768262400

Untrace/gambling

Sale 20:

https://backpack.tf/profiles/76561199017959799#!/compare/1769817600/1769904000

https://backpack.tf/profiles/76561198414515070#!/compare/1769817600/1769904000

Untrace/gambling

Sale 21:

https://backpack.tf/profiles/76561198414515070#!/compare/1769817600/1769904000

https://backpack.tf/profiles/76561199017959799#!/compare/1769817600/1769904000

Untrace/gambling

Sales:

5 (x2), 6

Sellers:

BPTF - https://imgur.com/P4kiUFW none, buyers up to 4.19 keys

MPTF - https://marketplace.tf/items/tf2/31154;5;u3063 $24.99 (~13 keys)

STN - https://stntrading.eu/item/tf2/Unusual+Hollow+Flourish+Taunt%3A+Time+Out+Therapy none, but there's a buyer at ~5 keys

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20Time%20Out%20Therapy?filter=Hollow+Flourish https://imgur.com/MdTOpbJ none

I would usually exclude the 2 sales at 5 keys given they were dumps, however in this situation they have been proven to be a more common trading point, and excluding them would mean using the highest sale out of 3 usable sales. There's only one buyer at the 5 key mark so I think 5-6 keys should be fine