Plug-in suggestion was closed, but the old sales there should be a decent mini (at the time of the sale) since the prospector has gone up a bit since it seems. Copy pasting the sales on the plug-in here:

Sale 1: https://backpack.tf/profiles/76561198083134207#!/compare/1593907200/1594080000

https://backpack.tf/profiles/76561198109749673#!/compare/1593734400/1594080000

Sold for a Haunted Ghosts Rotation Sensation (54 keys) + a Haunted Ghosts Brain Interface (16 keys) + a Strange Australium Scattergun (29 keys) + a Max's Severed Head (17 keys) + a Strange Australium Ambassador (~9 keys) + 16 pure.

54 + 16 + 29 + 17 + 9 + 16 = 141, buyout was 130: https://bot.tf/stats/listings/Y5ZGP6KE

https://bot.tf/stats/listings/MNRJQNE5

https://bot.tf/stats/listings/Y79KZK29

https://bot.tf/stats/listings/MVQ535VE

Sale 3: https://marketplace.tf/items/tf2/30031;5;u80 - 239/1.85 = ~129

https://backpack.tf/item/2050292230

I guess this is fine.

EDIT: appears the 5 keys seen here were involved, https://backpack.tf/profiles/76561198109749673#!/compare/1594425600/1594598400

That makes this 130 + 5 - 16 = ~119

So 120 flat would be better.