I like Water

Water has isotopes so this is VERY THEMED 100%

Sellers: - https://gyazo.com/ea7ca1d3c11cd20880131b4c11965df6

N/A

Sale 1)

https://backpack.tf/profiles/76561198082632923#!/compare/1501286400/1501804800 - Bulky (and low)

Sale 2)

https://backpack.tf/profiles/76561198082632923#!/compare/1500940800/1501286400 - SCM

Sale 3)

https://backpack.tf/profiles/76561198259205715#!/compare/1500336000/1500508800 - Sold for an Energy Orb Aqua Marine Rocket Launcher (Minimal Wear) (57) + ~13 Keys in Sweets = (70)

B/O: N/A

Sale 4)

https://backpack.tf/profiles/76561198129876495#!/compare/1506038400/1506124800 - Don't Match

https://backpack.tf/profiles/76561198179707937#!/compare/1506038400/1506124800 - Quicksold for 43 Keys

Sale 5)

https://backpack.tf/profiles/76561198404246879#!/compare/1505692800/1506038400 - High Outlier

Sale 6)

https://backpack.tf/profiles/76561198404246879#!/compare/1505433600/1505520000

https://backpack.tf/profiles/76561198238749150#!/compare/1505433600/1505520000 - Don't Match

Sale 7)

https://backpack.tf/profiles/76561198131103220#!/compare/1503792000/1504224000

https://backpack.tf/profiles/76561198202554772#!/compare/1503014400/1504656000 - SCM

Sale 8)

https://backpack.tf/profiles/76561198156255538#!/compare/1506729600/1506816000 - Sold for a Stormy Storm Helmet Without a Home (12) + ~33 Keys in Sweets = (45)

B/O: N/A

Sale 9)

https://backpack.tf/profiles/76561198092371264#!/compare/1504656000/1504828800 - Sold for a Duped Green Energy Fed-Fightin' Fedora (50)

B/O: N/A

Mini for Fedora:

https://backpack.tf/profiles/76561198403902482#!/compare/1507507200/1507593600 - Low (Buyers price)

https://backpack.tf/profiles/76561198403902482#!/compare/1507248000/1507334400 = 50 Keys

https://backpack.tf/profiles/76561198092371264#!/compare/1503792000/1503878400 - Cash/CSGO

(Other side traded too quickly)

Sale 10)

https://backpack.tf/profiles/76561198111776087#!/compare/1503705600/1503792000 - Sold for (35) Keys (non-quicksell)

Sale 11)

https://backpack.tf/profiles/76561198398958378#!/compare/1506988800/1507161600 - Bulky

Sale 12)

https://backpack.tf/profiles/76561198398958378#!/compare/1506384000/1506988800 - SCM

Sale 13)

https://backpack.tf/profiles/76561198257381394#!/compare/1506729600/1507939200

https://backpack.tf/profiles/76561198130508043#!/compare/1506816000/1507075200 - SCM

Sale 14)

https://backpack.tf/profiles/76561198186700182#!/compare/1505520000/1505865600 - Sold for a Nuts n' Bolts Exquisite Rack (30) + 4 Keys = (34)

B/O: N/A

Sale 15)

https://backpack.tf/profiles/76561198186700182#!/compare/1504915200/1505001600 - Sold for a Smoking Salty Dog (35) + A Searing Plasma Détective Noir (30) = (65)

B/O: N/A

Mini for Dog:

https://backpack.tf/profiles/76561198069591719#!/compare/1502841600/1503792000 = 40 Keys

Using 35 Due to Unsold (Was likely B/O of the sale as well) - https://gyazo.com/8122ab1d26dcd4f7ec9f3b0cd18d992c

Sale 16)

https://backpack.tf/profiles/76561198087172601#!/compare/1504483200/1504569600 - Sold with 2 Keys for a Vivid Plasma L'Inspecteur (16) + A Smoking Wraith Wrap (21) = (37)

B/O: N/A

Sale 17)

https://backpack.tf/profiles/76561198330128693#!/compare/1504224000/1504396800 - Sold with ~1 Key in Sweets for a Silver Cyclone Taunt: The High Five! (44) = (43)

B/O: N/A

Sales we have are:

31, 34, 35, 43, 45, 50, 65 and 70

Calling sales at 43 and under invalid as it can quicksell for 43 Keys

66 and 70 seem high due to a multitude of lower sales and like Foamy said I can't make this range one-ended.

Thanks =)