While I am no longer in New Zealand demanding that my brother the glazier make me larger and larger aquariums, I have noticed around here (Los Angeles) that saltwater prices and indeed prices in general really differ. I give you my royal gramma as an example. Where I work it was around ten dollars, two miles away it was eighteen dollars and further away still he was only four dollars. If you want the best price you have to shop around, but sometimes the cheapest fish is not the best. I would happily pay a little more to a fish store that had clean tanks and good looking stock. As well as employees not afraid to go and ask a question of thier peers and not just create an answer so they dont look stupid.