Resuggestion, thx Xerg

History: https://backpack.tf/item/2053964072

45 keys + Nebula Universal Translator (there are 45 matching keys in buyer's compare)

https://backpack.tf/profiles/76561198177872379#!/compare/1611705600/1611792000

https://backpack.tf/profiles/76561198796395930#!/compare/1611705600/1611792000

The Translator is In-date at 240-269 keys, median is 254.5 ~255

255+45=300, buyout was 300 https://gladiator.tf/listings/601013c20cae10b57f23af8f

270 keys + Disco Beat Down Smissmas Saxton

https://backpack.tf/profiles/76561198796395930#!/compare/1612224000/1612310400

https://backpack.tf/profiles/76561198104146629#!/compare/1612137600/1612224000

The Saxton is In-date at 110 keys

270+110=380, buyout was 450 https://gladiator.tf/listings/60185f0cc26a3ddba4402faf

However there was an earlier buyout of 350 which stayed up longer than the 450 one, therefore capping at 350 https://gladiator.tf/listings/60126b3392bf2851e8a226de

Going with 300-350