Hello to all out there, Need some advice/recommendations/comments please! much appreciated. I am looking to upgrade my current Mac Pro (purchased in Dec 2014 black cylinder model partitioned with Bootcamp Windows 8 and Mac OS) (currently fitted with original 256gb ssd) with a 1TB drive as it is now very low on storage with red indicator. These are some of the sellers I found on eBay selling the 1TB Apple-Samsung SSDs: (1) http://www.ebay.com.sg/itm/171808350986?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649 (2) http://www.ebay.com.sg/itm/151701291455?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649 (3) http://www.ebay.com.sg/itm/281711424100?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649 I found it very strange why the model numbers and part numbers do not seem to tally amongst the sellers: As per photos from (1), "MZ-KPV1T00/0A4 655-1860F (Date 2015.02)" (2) and (3) show "MZ-KPV1T00/0A3 655-1860D (Date 2015.03)" According to my understanding, these are revision numbers but why is a Feb version having a much newer revision than the March version? Also, these SSDs do not seem to have the heatsinks attached, is it crucial? I thought Apple does not sell its SSDs, why are there so many pieces available for sale on eBay and Amazon? I am worried that are these SSDs RMA products from the factory? Anyone has any experience with any sellers in the market which is trustable with genuine products? All comments are welcome Please, thanks so much in advance!