A tool that compares your Steam inventory to steamcardexchange.net and reports back your duplicate cards that are worth something on the site.
cargo run --release <STEAMID>
Example result:
Phasmophobia - The Hermit
Stock - 0
Price - Not available
Worth - 7 Credits
This application is not affiliated with steamcardexchange.net and I am not responsible if you were to make too many requests with this tool.