Examine the card in reflected light. Front and Back.

The card should be look clean and flat. Some curl for foil cards is allowed.

Look for:

Scratches	Creases
edge wear	Binder Marks

A little bit of light edge wear may be acceptable. Deoxys foils sometimes come with the foil showing around the edges straight from the packs.
A lot small scratches on the foil comes from playing with the cards, and spoils the card.

Look at a card brand new out of a pack - that's what I want.