No need to get defensive. I never told you what you needed, it was merely a suggestion. In case you didn't notice, the forum you posted in is about getting advice or help with a deal. I was just trying to help because a lot of people don't realize that the smaller and cheaper ones exist. If you only needed it for something small(as I suggested) then those would be great for you, but obviously you still want the 512 one.
Honestly, ebay is still your best bet($20 or so) unless you can find them on clearance in a store somewhere.