DSi & 3DS Development Units

I got involved in this conversation on NintendoAge:

http://www.nintendoage.com/forum/messageview.cfm?catid=29&threadid=124677

The OP is looking for the value of DSi & 3DS development units. I am curious what everyone here thinks they are worth. Since the OP didn't include many details, let us assume that there is no extra media or hardware with the units: just the loose systems. To be clear, I do not own these items. Thanks in advance for your help.

 

For the DSi, see this thread - http://www.assemblergames.com/forums/showthread.php?51375-Nintendo-sony-Dev-Kits

For the 3DS, I think $500-$600 is probably what it will get. There is more someone could do with it if they had the sdk.