While this isn't the most expensive Pokemon card ever sold in auction, it is the most expensive 2017 Pokemon card sold now, as well as being unique in that, aside from Rotom, the card doesn't feature an actual Pokemon
While PSA dominates the "liquid" market dictated by resellers, not collectors, CGC is definitely the most undervalued option
Dragon's Approach provides a burn spell with the ability to search for powerful Dragon creatures, creating a deadly combo
More recently Deed is a key part of many Landstill decks in Vintage, as they are facing down a lot of cards that cost one and two mana
I like the artwork a lot and used to play it in a deck as a kid
TCGPlayer TCGPlayer is the dominant marketplace for Pokmon singles in the US and functions like a stock exchange for individual cards