Then, even when you verify that you have one that’s worth 4 or 5 digits, that isn’t money until you find the particular collector willing to pay for it.
Thats why you get it graded. If its graded and is a high digit coin its very liquid and most dealers will be willing to pay close to full retail for it. You can take the graded coin and shop it around to dealers fast till you find the highest buyer. If its not graded then dealers will be all over the place on what they will give you.