In general, these are printed pieces of cardboard that are really worth whatever someone is willing to pay for it at any given moment in time. This includes you when you got it in the first place.
The addition of sentimental or experience value is another matter. That may make the cash price irrelevant - see above.
People dwell on the cash value too much. A lot of those people aren't real collectors. Enjoy the cards and the history, etc., not the cash profit.
I'm continually entering tradeable inventory. Full want lists are at https://thecollectivemind.blogspot.com/p/baseball-wants.html Use the green tabs to navigate.
Have entered 1994 thru 2021 baseball and 2009 thru 2020 football so far. Don't have many newer than 2020 except A&G in baseball, and very little beyond 2019 in football. My extra hockey is older than that.
The best I have for a tradelist otherwise is https://thecollectivemind.blogspot.com/search/label/Disperse%20the%20Hoard