Can't have a range with one sale my guy. There are also more sales here you should check out.

https://backpack.tf/item/6549275597

https://backpack.tf/item/6699651252

Example: Sold for $39 / $1.97 on marketplace.tf

https://backpack.tf/item/6699651252

https://marketplace.tf/items/30964;5;u62

https://marketplace.tf/items/5021;6/Mann%20Co.%20Supply%20Crate%20Key

https://backpack.tf/profiles/76561198204285311#!/compare/1523145600/1523232000

This would amount to ~20 keys.

The Aces High Frickin' Sweet Ninja Hood is also out of date and would need a recent sale within 3 months to see it's true value (aka a mini).

If you need a guide for how to price unusuals or how to find sales on items, check out these guides here:

https://forums.backpack.tf/topic/6033-rules-for-unusual-price-suggestions/

https://forums.backpack.tf/topic/59832-guide-how-to-use-the-compare-function/

If you need help, feel free to join the backpack.tf discord server and ask suggesters/moderators in the #suggestion-stuff channel after linking your steam account through the link in Jesse's message in #landing.

https://discordapp.com/invite/f5VS7cr

Good luck!