1 is the base market value for the card, just do alot of research of the card you haves price online, then gauge the condition of said card, be less damage, fading, marks, use, ware, tear, ot general signs of use at all, the less its worth. Im not an expert on it, but I am very knoledgeable about it. I have sold alot of very old cards, some of which I wish I wouldn’t have, like my neo genisis slowking 1995 mint 9 condition. Got alot of pretty pennies for it though. Overall, just the rarity of the card, the condition of the card, and the buyer’s intrest all effect the selling price. Dont take them to a pawn shop, nor a card shop. I suggest maybe ebay to sell them. Find the right buyer, they will pay more.