Im in Perth too and have had dealings with a few of the different sellers. Whilst I can understand the appeal of big stores which let you hold and play with the animals, I dont know if I really agree with many of their keeping methods. These are the stores that dont have reptiles as their primary business. I wont name any stores but it is usually pretty easy to tell i.e a big give away is monitors with no toes due to inadequate heat and hydration, snakes that do not shed etc. Its just my opinion but I think many of these are just in it for the quick sell and dont really care about the animals. Even if I saw a great looking animal in these stores I wouldnt buy from them as i dont want to give them my support.
These days I only go through the specialist dealers. Both Gary and Dave are great, and you can be assured that you are getting a quality animal and the advice is from experience.
Another bonus is that if you ever want to become more serious about your animals, these guys can tell you the exact locality type of specimen you have- trust me it makes a big difference when getting into breeding programs.