The only person who can stop re-selling is you. If people didn't buy from re-sellers, there would be no re-sellers - there would just be people with massive credit card bills and soon-to-be-repossessed cars filled with full size runs of sneakers. Yes, it's hard to resist buying a pair of sneakers you've spent months getting hyped for, no matter what the price. But pay it now and you'll keep paying it. End the cycle.
People need to stop paying resell prices.