If you're in the states,
Leetmod.com has an awesome deal on the SCDS1 right now.
SCDS1 SDHC :
$25.99
- 1 x Hard Cover Carry Case
- 1 x Supercard DS one microSDHC Adapter (Eng. Version White Color)
- 1 x Mini CD-Rom with user's manual and system files
- 1 x USB-MicroSD Card Reader (SDHC Compatible)
- 1 x Quick Installation Guide
SCDS1 SDHC + 2GB Kingston JP MicroSD Card :
$29.99
- 1 x DSone SDHC Cartridge (not in retail package)
- 1 x Kingston made in Japan 2GB microSD (no SD adapter)
- 1 x USB 2.0 microSDHC Card Reader
- 1 x Hori Screen Protector (Optional but FREE)
I've already ordered one myself and will see when it arrives. But ya can't get a better deal than this probably.
EDIT: I was checking dealsextreme and they've got some
slightly cheaper prices on the Supercard, but I wouldn't recommend them. Their prices are great, selection amazing, and just about any order offers free shipping. However unless you're the extremely patience type you're better off elsewhere. Shipping can take 2-6 weeks varying on location and time shipped.