New SSD....Is it new??

Hello, last week I bought a Samsung 830 256Gb described as new & unused off eekbay. Sure enough it arrived not in a retail box but sealed in an antistat bag, Model # MZ - 7PC256D. The casing is plastic unlike the metal casing on another new 830 I bought that came in a retail box.

Now I'm assuming that the plastic case most likely means that it is a pulled oem drive. Is there any way to tell if it has been used? Thanks in advance.