spaceship deck yugioh What do you mean Spaceships aren't cool anymore?! [Gradius Deck] - Yu-Gi-Oh! TCG/OCG Decks

Other collectors may simply want to get their most rare and valuable cards graded because not only do PSA give your card a grade they also encapsulate the card to completely protect and preserve it, so not only does it score a certain grade, it will be maintained

Pokemon TCG 1st Edition artwork by Biochao on DeviantArt

Using trainer's and pokemon that apply multiple special conditions to take KOs with Ariados and Victreebell. 

Often the more modern sets have been printed in such huge quantities that there is a plentiful supply of pretty much every card in the set and so they tend to not be as expensive as older cards