Welcome to the forum 🙂
Whatever they're 'worth' now, it'll probably be a LOT more if you can hold onto them for a decade or more… could fund your retirement.
What you'd get now depends on:
♣ How many are currently on the market. The more, the less each will sell for—ideally you want to be the only copy on sale.
♦ What recent copies have sold for.
♥ The condition of your copies v the condition of recently sold copies—this can make a big difference, especially between a sealed never-used copy and an open-box one.