I agree with gon. The best value for money *cough cough (sorry, I just choked on something)* you will get here is to buy the most defined sets possible. By this, I mean a premade file, who's content is clearly defined.
Trying to collect a large number of cards is for the long term and sadly your $50 expenditure will not even scrape the top of the iceberg.
Please try a premade file with either matching ex set or faction packs. There is no harm in getting more than one premade file from different spheres.
But please, for your own sake, try to avoid boxes and normal packs until you decide you are ready to spend the $1500+ that some of us have spent for the priviledge of being able to play this game with a larger/majority (not complete) card pool.



