Check around a little for prices and dealers. And different dealers have different personalities. The dealer should have your collecting goals in mind, and suggest pieces that suit your preferences. For example, I like to establish how long a client has been collecting, what characters or films they like, if there is a specific price range, how many pieces they may be looking to acquire, etc. Only then, do I recommend pieces that I feel work best for the client.
Prices vary for a variety of reasons.
Reproduction -How strong the perceived demand for a piece is for that individual gallery's clientel. Often it is cheaper to acquire a piece from the US even after adding in shipping and customs, but not always. Check first to avoid any unpleasant surprises. Logically, the more galleries, the more competitive pricing needs to be. With production art, the sources can run from attic finds, to animators, to other dealers.