I sometimes wonder how some of these have stayed unpriced so long

https://backpack.tf/item/9377085664

excluding Mannco.Store sale

https://backpack.tf/item/5710524416

2 keys match in seller's compare, hwoever the 6 keys in buyer's compare match via histories:

https://backpack.tf/profiles/76561199084784906#!/compare/1704153600/1704240000

https://backpack.tf/profiles/76561198081413306#!/compare/1702598400/1704240000

Taking 6 keys here

~~

https://marketplace.tf/items/tf2/30816;5;u3045

December 12: $13.99/1.736=8.06 ~8 keys

December 22: $13.99/1.671=8.37 ~8.5 keys

(key prices https://marketplace.tf/items/tf2/5021;6

12/12: (1.74+1.74+1.73+1.73+1.75+1.73+1.73)/7=1.736

22/12: (1.7+1.7+1.68+1.67+1.67+1.64+1.64)/7=1.671

Taking 6-8.5 keys here