I'm planning on buying a pair of 24K X-Squared as my first purchase for the year (as mentioned in the X-Metal Exchange section of the forum). I've notice quite a few pairs of these on eBay recently that are etched with SAMPLE instead of a serial number. From my understanding, these are still legit pairs that are made for Oakley reps and promotional use. What are your guy's opinions on these? Should I buy one of these or just pay the extra and get a serialized, complete BNIB pair?