I just bought a SanDisk Standard SDHC at 8GB (Red top, Blue middle, White bottom).
I’m suspicious because on the front is a CLASS 4 logo. I have not been able to find this on the SanDisk website. All their Standard SDHC at 8GB are CLASS 2.
The serial info on the back of the package (ABOVE BARCODE) is:
And the barcode serial:
6 19659 03964 6
And below that: