Check the threads in the blackmarket section here on epvp. Check the reviews, check how long a cheat has been sold for. Search the forum for the name of the seller to find any threads accusing him of scamming.
After all that you should be relatively safe. At least way safer than blindly purchasing off of some mass-selling site.
After all that you should be relatively safe. At least way safer than blindly purchasing off of some mass-selling site.