From what I can make out, you aren't actually able to buy R4s in your local store. However, you are able to buy them online. A good place to start is this website:
www.ozmodchips.com/r4-ds-r4ds-p-25.html
I haven't bought one yet but from what I have read this is website is worth a look.
Hope that helped!
No its not
A great place to get r4s, m3's and edge cards is a website. It has a great range of r4s and loads of ds excessories
They are illegal in some countries, such as the UK.
It is C6-X5-125892-R4S
The ridge runner game is not compatible with the PS3
Its an ereader for any kind of ds and it comes with most R4s
No.
Check the related links for a trusted site that sells R4s for both DS and the new DSi. As for locally, you may just have to check around at your local Gamer places, but make sure to do your homework first! Find out EXACTLY what you need and look for that. Don't let the guys behind the counter try to sell you something that will not work with your console. Also learn how to use R4s if you do not already know.
yes they can they are most common with the r4s so get a different one insted of an r4
You hook it up to the computer, with the cably thing that came with it, or just buy it.
No. R4i and R4 are not illegal. R4i and R4 are only illegal if they have games on them.
It is a ebook reader for ds flashcarts. It is a state-of-the-art nds homebrew and comes with many R4s