I'm returning to the game again after playing casually and semi-competitively in the mid-90s.  I am starting my second collection of cards at this point, so I consider my collection to be sparse and somewhat meager. 

My son is getting to the age where I would like to teach him how to play and how to construct fun and competitive decks, so I thought that the best way to get some of the cards that he and I are looking for would be through a trading site like this one.