Ebay SDHC card seller recommendation, please
IMO the safest place to buy on-line is from reputable retailers like B+H Photo or Adorama. Their prices are as good or better than those on e-bay, and they guarantee their products are authentic. I have used them for many years and have never had a problem with any of their products, cameras, lenses, filters, SD Cards (I only use San Disk or Lexar).
I don't know if they ship to Malaysia, but I would give them a try.