It sounds like you're almost there! You do have to add up both faces (these are the Type and Alignment of the card, you can see if they are valid using the notes in the toolbar!), as well as the values of the stats and any other miscellaneous additions from the valuation guide. Before you value a card, make sure the card you are valuing is real and not fake! Use all of the notes from the toolbar to identify and appraise the cards and you'll be a top inspector in no time.