http://www.r4ds-ds.com/brands/r4sdhc.com.html got my R4 from here, for like 20-25 bucks, with a 4 gb Kingston micro sdhc card thats a pretty good deal, other Sandisk 4gb cards i got were 10$ each, so R4 isnt too expensive, but yeah its getting a little outdated, but it can still perform, more...