Buying things and selling them for more golds is not a scam. If people are willing to pay the price, where is the problem? Even the real life work this way, it´s been merchant practice for a quite some time. And resseting the gold? Sure, reset it, reset the progress you´ve mad in your achievemants, reset your mount collection. Just because some people are not willing or able to make gold, it doesn´t mean that others can´t make them as well. The reset won´t make economy any different. The economy works well, problems are just those pilles of gold that came from nowhere that devalued golds so the prices are in big numbers. People who haven´t been playing in expansions where making gold was easy are struggling, which is problematic. On the other hand, if you take their rightfully obtained gold they had had played for, where is the justice?
But back to the mounts. If it´s recolor and you don´t like it, don´t buy it. If you´re collector, than you have to invest your time into the collecting. Be it farming of bosses or “farming” of golds as currency. Like in the real life, if you can´t afford Mercedes S-class, you have to buy a Toyota because it´s in your price-range (if you wanna buy a car).