Why? What good would this do the Res economy, even if it's just virtual one? Besides, there are other ways to change your pet's color. There's always NCJB's (Natural colored jelly beans) but those are credit shop items and they're more expensive.
Or, you could just take your pet to the enchanted springs everyday, and anytime from tier 16 and up, the springs may randomly change your pet's color, including both hatch and dye kit colors, for free.
I'm sorry but I really don't see the point of reducing the price. There's a reason that they're like that.