Armed Dragon Lv 10
just keep the ones that are worth something right now they'll be worth more in the future

Cris C
i have a couple of my cards left though i threw away alot. to me it brings back memories so thats why i keep a couple.sell them when they become classic cards

Josh
sell all of them on ebay and take out the ones you really wanna keep!

Alex
SELL THE YUGIOH CARDS NOT POKEMON POKEMON IS STILL FAMOUS

Eureka!
you should keep old pokemon cards only if your a collector, otherwise you should just sell them. old cards cant be used in tournaments so the worth goes down. the only old cards that are still worth something are EX's, Stars, Shiny, etc. if u have a charizard ex or wailord ex you can get quite a bit for them

Shinzy
I am not knowledgeable about Yu-Gi-Oh! cards, so I do not have a suggestion with them. Firstly, Digimon cards. These cards were pretty much thrown together without an easy to understand battle structure- meaning that the cards were never really worth anything because the kids didn't know how to 'use' them. They were pretty cheap when first released, and have only devalued over time, so you should be good to just sell them now if you wish. Pokemon, on the other hand, has had some fluctuations. If anything, I'd say keep those cards. Right now the Pokemon market is at an extreme low- I'd hold on to those for a while more. If anything, just keep them in a nice safe place (not an attic or basement) away from heat or moisture.