Resuggestion, thanks to Xerogyf & Blaze for the info!

Sale 1:

https://backpack.tf/profiles/76561198089253101#!/compare/1585526400/1585612800

https://backpack.tf/profiles/76561198878866368#!/compare/1585526400/1585785600

Bulk

sale 2:

https://backpack.tf/profiles/76561198878866368#!/compare/1585785600/1585872000

https://backpack.tf/profiles/76561198118157202#!/compare/1585785600/1585872000

https://backpack.tf/profiles/76561198118157202#!/compare/1585872000/1585958400

https://backpack.tf/profiles/76561198176022675#!/compare/1585872000/1585958400

Bulk / untrace

sale 3:

https://backpack.tf/profiles/76561198176022675#!/compare/1585872000/1585958400

https://backpack.tf/profiles/76561198322560312#!/compare/1585872000/1585958400

Untrace

sale 4:

https://backpack.tf/profiles/76561198158373957#!/compare/1584316800/1584403200

https://backpack.tf/profiles/76561198052169787#!/compare/1586908800/1586995200

Untrace

sale 5:

https://backpack.tf/profiles/76561198052169787#!/compare/1587081600/1588118400

https://backpack.tf/profiles/76561198148511293#!/compare/1586995200/1587081600

high / bulk

Sale 6:

https://backpack.tf/profiles/76561198148511293#!/compare/1588550400/1588636800

https://backpack.tf/profiles/76561198799477156#!/compare/1588204800/1588550400

Bulk

sale 7:

https://backpack.tf/profiles/76561198799477156#!/compare/1588982400/1589155200

https://backpack.tf/profiles/76561198084976847#!/compare/1588982400/1589068800

Sold for Spirit Pipes

Pipes Mini:

https://backpack.tf/suggestion/5ecd52107b3cd310e459a600

Suggestion for 8.25 keys

Low.

https://bot.tf/stats/listings/MQ076N62

B/O of ~11.5 keys

Sale 8:

https://marketplace.tf/items/tf2/539;5;u32

$23 / $1.77 = 12.99 keys

Xerogyf’s Part:

https://backpack.tf/profiles/76561198432770108#!/compare/1566950400/1592265600 - looks like SCM

https://backpack.tf/profiles/76561198026526425#!/compare/1592697600/1592784000 - supported by the fact it takes 7 days before next (untracable) sale

https://steamcommunity.com/market/listings/440/Unusual%20El%20Jefe

Prob a Jun 15th sale, most likely the $27.66 one (though not 100% sure on this)

Would be $27.66/2.5 = 11.064 = 11 keys

https://bot.tf/stats/item?def=539&q=5&ef=Orbiting%20Planets&craft=1&aus=0&ks=0&source=browser_script

https://imgur.com/a/FTTCNOq

New sale @ 9.5 to a bot's buy order

13 flat is almost certainly high here, maybe including the bot buy order as the low end might work, going 10 - 13. SCM sale would most likely fit the range, with low end prob being low but high end prob being high

Blaze’s Part:

yeah i agree with including 10 in the range as the sale at 8.5 supports a lower price as well. in addition to this there have been a few lower b/o's as well which further supports that 13 flat is high:

https://bot.tf/stats/listings/MQ076N62

https://bot.tf/stats/listings/Y80O573D

Taking 10 - 13 keys.