Grading costs money and takes time, so it usually only makes sense for cards already likely to be valuable based on rarity and condition
For example, in Urza's Destiny (the set where I was the entire design team), there were two different cycles that explored effects that scaled based on how many cards of a certain color were in your hand
The Ever-Changing Dane Copy effects always lead to creative plays, and The Ever-Changing Dane gives you that flexibility every turn by sacrificing a creature to become a copy of it
He's still smiling, even as he's being abused by Leshrac painting an evil, evil rune on him
28) Korean Base Set Pikachu (Base set 58/102) Korean 1st edition SPOILER: Click to show 600800 148 KB Korean unlimited edition SPOILER: Click to show 600800 143 KB The unlimited edition Korean Cards had a pretty short print run, so these cards are pretty hard to find
there are so many selections that you'll be able to create a team (or deck) that represents you as a player