If the sale was 1000 Keys and a Nebula Universal Translator, that's worth more than 1390 Keys. In the future, write out what each sale is in suggestions.

https://backpack.tf/profiles/76561198140316312#!/compare/1667088000/1667174400

The Translator is outdated, so you or someone else will need to look into its sales to give an updated estimate of its price.

Until that's done, this suggestion will need to be closed. If you need help finding those sales, feel free to ask.