Price suggestion for Dead Presidents Tyrantium Helmet --> 9 to 11 keys

Traded for a Non-Craftable Spine-Chilling Skull 2011 - https://backpack.tf/stats/Unique/Spine-Chilling%20Skull%202011/Tradable/Non-Craftable

which current buys and sells between 9 to 10.6 keys (priced a month ago)

Recent sale figures of spine (as of 5/07/25): https://imgur.com/a/d578i0m

Proof of sale: https://imgur.com/a/cd1ff7k

Current backpack buy and sell orders for Tyrantium: https://imgur.com/a/DgCnjE2

Sellers on SCM at 45.87 AUD at current conversion rate is 30.05 USD / 1.90 USD = 15.79 keys: https://imgur.com/a/ToVl9fB

Marketplace.tf is 45.74 which skipping the math is about 15.7 keys: https://imgur.com/a/GOnUnJe

Feel free to let me know if any of the other 43 of these buggers has sold to add evidence.