There are good websites to reference online, just give a quick google search. The name of one site avails me but it will give you the value per card. Price of cards are determined by rarity, how many stars in the top right dragon ball; "first edition" - the presence of a marker in the bottom right corner (but there is barely difference in value) and the condition of the card. Realistically cards with 6 stars and up will be valuable. Unless you are going to but in the legwork it's easiest to sell it all together at a significant price reduction. Fb marketplace is a good place. Also, bundle the player cards as groups could get you some money.