Pokemon cards for sale in sleeves, never used

I used to collect these since I was young, and now I want to sell them to someone who needs them more than me because I don’t know what to do with them anymore, they’re in mint condition, scratches, nothing, additionally, nearly all have sleeves, all of these Pokémon cards are very rare and are worth a lot of money judging by online services which put a price on each of these cards