Demand is getting out of hand. For example, why should people have to pay tons of rares and very rares for a certain rare that is in high demand? All you should have to pay is a pet that is in equal value to the one you're asking for, and not ridiculously overpay. Demand is making it so hard to get any pets you want.
Oh, and also another thing. Overpaying for unknown pets. Some people expect others to pay rares for a pet of unknown rarity just because it might be rare in the future. Well, what matters is that it's not rare right now, and no one can predict how rare it will become.
(I'm not sure whether this thread should be here or in Chicken Smoothie Chat)