You can never have too many memory cards, in my opinion, especially if you're a camera junkie prone to forgetting where you've left the last one you were using.
Lunchtime Deal: Two 4GB SD Cards for $6.95
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Five years ago, I threw away a hard drive. An utterly generic 250GB portable hard drive, already a few years old, with a couple of dings and scratches in its shell and with the beginnings of an audible click that would have eventually killed it. It had a data file containing 1400 Bitcoin on it. No big deal, at the time. Today, those few kilobytes are worth more than four million dollars.
You can't make this s*^& up. Or can you?