It could be worth next to nothing as time passes. If it no longer brings you joy, it may be time to ditch it and find something that does. Life is too short to worry about the maybes, what the market might be in the future.

Another thing you might think about is trade value. This is not necessarily equivalent to monetary value. As an example, I traded on a two-for-one to get a game I really wanted. I could have posted them for sale, and to get the price I wanted may have had to wait a while to sell both games and then find the desired game. For an immediate trade, the convenience and time saved to not have to go through a long sales and buy process carries a value beyond dollars. If you are simply tired of a game consider you might consider its value as trade bait.