my mom was very nice to keep these for so long. she said she saw someone on antique roadshow got their pokemon cards assessed and she told me to take these and see if they're worth anything

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my mom was very nice to keep these for so long. she said she saw someone on antique roadshow got their pokemon cards assessed and she told me to take these and see if they're worth anything
Hell yeah. First thing I would suggest is checking prices on any you thing may be worth something. TCGPlayer is a good place to look, though bear in mind that any you sell you are going to get less than what shops are selling then for. After that, see if you've got a local game store that buys cards and is willing to give a decent price for any they buy. When I've sold locally they would give me a price they would buy them at assuming after grading they were in good condition, then they graded them and have me the adjusted price based on grade.
2nd this. If you have too many cards to price one-by-one, single out any holographic cards, promo cards, or ones with low total set numbers (usually promotional sets) for looking up on tcgplayer.
Some of the older cards that weren't particularly rare have also ballooned in price, so if you find some from a certain set that seem spensy, look through some of the non-holos for that set too.
Don't bother with grading unless the ungraded card is worth quite a lot on TCGP already, and it is in blisteringly mint condition.
You can also use pkmncards.com (Hi! I admin that site) to quickly find cards and get rough price estimates that are pulled from TCGPlayer.
Yuka Morii! She's one of my favorite artists for the TCG, all of her illustrations are adorable little clay models