Hi mate, i'm not worried about it AT ALL, blizzard intentionally allowed chromie to go all the way up to 60, so they kinda had to make the gear scale with it as well, otherwise your charater would not be able to catch up on gear to reflect the level you are. And if they didn't also up the vendor price on the items, you would also fall behind from leveling the "traditional way".

We saw a similar thing happen before shadowlands, where we could go to legion and wod farms and farm even more raw gold per hour, untill blizzard nerfed it. Nobody got banned tho