Poké cards

Hi!

A while ago I've bought my son a bunch of poke cards (like, lots!) somewhere on the Internet, probably on some chinese service like Ali Express. Now he's 11 and claims some if those cards are valuable. They actually look genuine, got holographic bits on them and all. How do I find if they are in fact of some value?

Thanks for your help!

Welcome! I'm going to go ahead and move your thread to the right forum. :)

Also! There is no way for us to determine 100% if a card purchased online is authentic without seeing pictures of it, so please include some if you can!