Like I said earlier it's the quick ref page you have to avoid not the pets lookup page
(Though I think that's what you meant, just clarifying ^^).
Most people do know about the healing springs like I say, the fact is though that sometimes people want a quick fix. if I'm battling with my pet and he catches something I have far less patience with the healing springs so I'll pay more to cure him.
I do think it would be a good idea for Neopets to have an official Dailies Page with links to all that is free in Neopets and a description of what each place does, how often you can use it etc. I'm not sure how much of an effect that would have on medicine prices though as there are always those that will just try the healing springs once and then buy the cure if the pet is still ill.