https://marketplace.tf/items/tf2/31100;5;u135

a) 48.98/1.79 = 27.36 -> 27 keys

b) 32.25/1.79 -> 18 keys

c) 40.58/1.87=21.7 -> 22 keys

d) 49.99/1.91 = 26.17 -> 26 keys

e) 36.25/1.93=18.78 -> 19 keys

f) 53.5/1.94=27.57 -> 28 keys

g) 41.99/1.94 = 21.64 -> 21 keys

h) 35.15/1.98 =17.75 -> 18 keys

im not counting 28 due to amount of sellers at $48

2) https://backpack.tf/profiles/76561198311498888#!/compare/1597190400/1597363200

https://backpack.tf/profiles/76561198302529690#!/compare/1597190400/1597276800 im not entirely sure

3) https://backpack.tf/profiles/76561198302529690#!/compare/1596931200/1597190400 untrace

4) https://backpack.tf/profiles/76561198876489925#!/compare/1597363200/1597708800 20.3 keys

5) https://backpack.tf/profiles/76561198071784776#!/compare/1596931200/1597190400 untrace

6) https://backpack.tf/item/8988770504 bp's havent load yet

7) https://backpack.tf/profiles/76561198905839611#!/compare/1596758400/1597017600

https://backpack.tf/profiles/76561198267189538#!/compare/1596931200/1597017600 untrace

8) https://backpack.tf/profiles/76561198063054044#!/compare/1594252800/1594684800 untrace

9) https://backpack.tf/profiles/76561198219288407#!/compare/1596412800/1596585600 18 keys + some ref

10) https://backpack.tf/profiles/76561198055991746#!/compare/1594425600/1595808000 Strange Nether Trail Smokey Sombrero

11) https://backpack.tf/profiles/76561198382267048#!/compare/1596758400/1596844800

https://backpack.tf/profiles/76561198832967045#!/compare/1596672000/1596844800 untrace

12) https://backpack.tf/profiles/76561198322035911#!/compare/1596153600/1596326400

Strange Circling Peace Sign Voodoo JuJu (Slight Return) + 2 keys (unpriced)

13) https://backpack.tf/profiles/76561198204138151#!/compare/1597363200/1597536000 bulk sale

14) https://backpack.tf/profiles/76561198046621619#!/compare/1597190400/1597276800

Strange Professional Killstreak Woodland Warrior Rocket Launcher (Factory New) 12.5 + strange Lone Survivor (3 keys) + Veterans Attire 2 keys + 3 keys and some ref = around 21 keys

15) https://backpack.tf/profiles/76561198160298174#!/compare/1595980800/1596067200 bulk sale

16) https://backpack.tf/profiles/76561197964171516#!/compare/1597622400/1597708800

https://backpack.tf/profiles/76561198188227129#!/compare/1597622400/1597708800 21 keys

18-21 is pretty strong here, but i think is still possible to sell for more