Sale 1: Untrace.

https://backpack.tf/profiles/76561198185198978#!/compare/1559606400/1559865600

https://backpack.tf/profiles/76561198040433652#!/compare/1558137600/1559692800

Sale 2: ~29 Keys Pure.

https://backpack.tf/profiles/76561198000263169#!/compare/1559779200/1559865600

https://backpack.tf/profiles/76561198107793922#!/compare/1559606400/1559865600

Sale 3: ~40 Keys. (Calling Outlier - Thanks to ✪Wrein!)

Sold For Starstorm Insomnia Galvanized Gibus + Haunted Ghosts Brain-Warming Wear + 5 Keys.

B/O was 40 - https://bot.tf/stats/listings/4KE7QG14

https://backpack.tf/profiles/76561198158206236#!/compare/1556841600/1556928000

https://backpack.tf/profiles/76561198805856129#!/compare/1556841600/1556928000

Sale 4: ~26 Keys. (QS)

https://backpack.tf/profiles/76561198805856129#!/compare/1556928000/1557014400

https://backpack.tf/profiles/76561198337734785#!/compare/1556928000/1557014400

Sale 5: Untrace.

https://backpack.tf/profiles/76561198337734785#!/compare/1558656000/1558742400

https://backpack.tf/profiles/76561198065377493#!/compare/1558483200/1558828800

Sale 6: Bulk.

https://backpack.tf/profiles/76561198310972287#!/compare/1555632000/1555718400

https://backpack.tf/profiles/76561198859721638#!/compare/1555632000/1555718400

Sale 7: ~29 Keys Pure.

https://backpack.tf/profiles/76561198859721638#!/compare/1555632000/1555718400 - ID ==> 7713173359

https://backpack.tf/profiles/76561198315248068#!/compare/1555632000/1555718400

Sale 8: ~35 Keys.

Sold For Terror-Watt Crack Pot (12) + Bubbling A Hat to Kill For (16, Using the current price cause there is no usable sale to use.) + 7 Keys = 35 Keys. - Thanks to lemons!

https://backpack.tf/profiles/76561198315248068#!/compare/1555718400/1555804800

https://backpack.tf/profiles/76561198165205268#!/compare/1555718400/1555804800

Terror-Watt Crack Pot's Mini:

https://backpack.tf/suggestion/5d277b0f6780724b2505876a

Sale 9: Use There.

Sold For Purple Confetti Dark Falkirk Helm + 3 Keys.

https://backpack.tf/profiles/76561198165205268#!/compare/1555718400/1555804800

https://backpack.tf/profiles/76561198043826027#!/compare/1555718400/1555804800

Sales: 26/29/29/35/40

Going with 29-35 keys.

Thanks to scourge for the premium and everyone else who helped!