Only history with recent sales: https://backpack.tf/item/8218378076

Marketplace.tf sale: https://marketplace.tf/items/tf2/30827;5;u129

July 29 2020: $23.60 (key=$1.92, 12.29 keys) ~12 keys

Item history indicates it was deposited on june 7, took around a month and 22 days to sell

20 keys pure:

https://backpack.tf/profiles/76561198007876507#!/compare/1596067200/1596240000

https://backpack.tf/profiles/76561197964171516#!/compare/1596067200/1596240000

Seller listed at 20 keys https://bot.tf/stats/listings/Y9QOG5P6

was first listed on July 29, sold on August 1, sold within less than a week https://bot.tf/stats/listings/466L2W72

Both sales are the same item, when it was bought for 12 via marketplace.tf, it was instantly listed on backpack.tf at 20 and disappeared within a few days, gonna call 12 low

Going with 20