One last time

Bought for a Smoking truckers topper (13 key active price suggestion) + 1 key + 1 ref + calamitous cauldron (unpriced craft hat)

https://backpack.tf/profiles/76561198046353418#!/compare/1603238400/1603411200

https://backpack.tf/profiles/76561198138674450#!/compare/1603324800/1603411200

Appears to be bought for a Disco Beat Down Metal Slug (16 keys, 3 years out of date)

https://backpack.tf/profiles/76561198138674450#!/compare/1603152000/1603238400

SOLD for 17 keys

https://backpack.tf/profiles/76561198046353418#!/compare/1603497600/1603584000

https://backpack.tf/profiles/76561198116046221#!/compare/1603584000/1603670400

Marketplace.tf sales

https://marketplace.tf/items/tf2/30026;5;u61

Sales at:

25.99 ~ 13 keys (likely outlier)

40.00 ~ 21 keys (likely outlier)

30.00 ~ 16 keys

Sales at:

13 keys

14 keys

16 keys

16 keys

17 keys

21 keys

21 and 13 are likely outliers as more sales have occurred between the 17-14 key range, so I am recommending that as the price.

Re-suggestion from https://backpack.tf/suggestion/5f9c63d121f80b75e5765140#comment-5fb87bb8b8962f05402becc7