Dynamite with a laser beam.

Thanks to CrazyCoww and blizz for giving me some tips involving including all sales.

MP Sales and the item in question:

https://marketplace.tf/items/tf2/202;15;u701;w4;pk235;festive, https://backpack.tf/item/7632757501

$47 on May 28th, keys @ 1.91

47/1.91 = 24.6 (rounding to 25)

$40 on June 5th, keys @ 1.96

40/1.96 = 20.4 (pretty low, below buyers even - https://prnt.sc/szmbm5)

Sale 3 - 34 pure (my purchase)

https://backpack.tf/profiles/76561198006295346#!/compare/1592006400/1592092800

https://backpack.tf/profiles/76561198099141522#!/compare/1592006400/1592092800

https://prnt.sc/szm97h

Sale 4 - (untrace and probably unusable but including for the sake of inclusion)

https://backpack.tf/profiles/76561198304302520#!/compare/1585008000/1585094400

https://backpack.tf/profiles/76561198080111905#!/compare/1567209600/1585094400

20, 25, 34

Taking 25-34.