Note I didn't say get the CARDS from DX, I said the CR-5400. They can't fake that. My MicroSDs come from Newegg, and that's one of the few places I would trust to get the actual memory from.
That being said, the CR-5400 can be obtained cheaply on Amazon as well, if you're not inclined to go through DX.
In retrospect, reading my post might give the impression that I got my MicroSDs from DX, if not parsed very carefully. Darn it, ambiguous English language! I should have probably clarified both sources in the first sentence, as opposed to waiting until the end to state that MicroSD prices at Newegg had gone up a notch since I ordered.
Oh well.