Destiny has a very robust character customization system that only gets better with time. When Destiny 2 comes out later this year or in early 2016, that will probably change. For the time being, developer Bungie Studios has done a fine job of pushing copious amounts of post-launch content out the door.
At any rate, it's come to light that one eBay user has started selling shaders available in-game for free at a cost. The problem was around at the game's launch, when scalpers took advantage of players who didn't know any better, but the issue has returned. Apparently an eBay user is looking to take money from the thousands of players who weren't around for the launch issues.
There are shaders in Destiny that can fetch a pretty hefty price, as they were only available during certain pre-launch promotions or events; they are also some of the coolest ones available! That said, if you're being sold any of the shaders in this list, be sure to move away from the 'Buy It Now!' button.