the cheapest ds is at barnsavers it is $20
The original Ds $120 in American
E-bay
You can get it at Target. Thank you
Internet.
$129.99 as of 7/31/12
I dont know but gamestop would be best
I'm guessing eBay Amazon or Walmart.
probably at e.b games or game on
The cheapest Nintendo DS ever obtained would be one given for free, either as a gift or as a prize. The common price of a Nintendo DS is $139.99 however, these have been on sale for as low as $99.99 during specials such as during holiday season.
The cheapest i have seen was for £5.42/$9.50 (not including P&P or MicroSD Card) There are too many r4 ds card in the market currently. The cheapest r4 ds card cost about 5EUR. But it only support DS and DS lite. The famous card is r4i sdhc 3ds. It support Nintendo 3DS,DSi,DS. So, I suggest you to buy a r4i sdhc 3ds card.
You can try going to a nearby Hock Shop.
I've seen DSi's on eBay for quite cheap. your best bet is there.