I looked at compares a lot to come to this conclusion, and it is option b, Executioner+Scopers traded for the unusuals, then the unusuals were traded for the viewfinder.

Here is the Smoking Viewfinder suggestion at ~165 keys

https://backpack.tf/suggestion/5f4ef94b00ef9b2a901b3b16

Here is the sale analyzed (also in the Smoking Viewfinder suggestion):

[[[[[[[[[[[[[[[

https://backpack.tf/profiles/76561198061376237#!/compare/1596326400/1596412800

https://backpack.tf/profiles/76561198097499917#!/compare/1596412800/1596585600

https://backpack.tf/profiles/76561198147532685#!/compare/1596412800/1596585600

Item Stack #1 Smoking Viewfinder

Item Stack #2 Strange Scorching Executioner, Searing Sloper Scopers, 2 keys

Item Stack #3 Burning Sky Fly Guy, Sunbeams Translator, Cloudy Moon Cowl, Strange Gibus

-- #3 traded the four items (cowl, sky guy, translator, gibus) for #2 (s. scorching executioner)

-- #3 leaves the 3rd compare link, #2 goes into the 3rd compare link

-- which in between trades, would make the 2nd compare link look like item stack #2 leaves and item stack #3 enters

-- then, the 2nd compare link, trades item stack #3 for item stack #1 (smoking viewfinder)

-- which removes stack #3 from 2nd compare, leaving just item stack #1

-- and makes 1st compare look like item stack #1 leaving, item stack #3 entering

trade 1:

[[ Burning Sky Fly Guy, Sunbeams Translator, Cloudy Moon Cowl, Strange Gibus ]]

for

[[ Strange Scorching Executioner, Searing Sloper Scopers, 2 keys ]]

trade 2:

[[ Burning Sky Fly Guy, Sunbeams Translator, Cloudy Moon Cowl, Strange Gibus ]]

for

[[ Smoking Virtual Viewfinder ]]

]]]]]]]]]]]]]]]]]]]]

So as far as the Executioner goes, I'm certain that it only touched the Burning Sky Fly Guy/other stuff.

Burning Sky High Fly Guy - 35 keys https://backpack.tf/suggestion/5f0c23578a75df650671d7c9

Sunbeams Universal Translator - 38 key buyers https://gyazo.com/401757e331a0e6b5acd91d9f3c23bda9

Cloudy Moon Cowl (Duped)

Strange Gibus - 27 key buyers https://gyazo.com/8686981cb71f293152550994fdc726b6

In essence, this whole stack of items has a mini which is the Smoking Viewfinder that had a buyout of 175 keys

the other three items add to 100 without the cowl, and clean buyers on cowl are 85 keys https://gyazo.com/98449952fc6601cad3543de9789741a3

I couldn't find a buyout on the Strange Scorching Executioner on bot.tf/cache

I think taking the smoking viewfinder at 165 (current updating) for the high end should be fine in this situation, since all those unusuals were traded immediately for the smoking viewfinder. the sale could be a lot more depending on the cowl (i didn't look into any of its sales, it may have them), but considering they used it all on an item with a 175 key buyout, i can't see the strange scorching executioner being more than that.

What do you think? Should the high end just be 165?