Really? ... What's an NTSC motherboard worth these days?
The problem is FINDING one. An NTSC A600 will probably fetch a good hundred to two hundred USD, but they are very hard to find. I would have to estimate for every NTSC A 600 that exists, there are probably 50- 100 PAL units (if not more).
From what I understand it is like the A1000 over in Europe. Here in North America, they are quite plentiful and very easy to get, but I understand that is not the case over there.
I would have to argue that the least popular Amiga, depends on the region of the world they are in. Here in Canada, the A2000 seems to be the least popular and most available unit (other than the A500). I, for the life of me, can't understand why someone would even consider taking an A500 over an A2000, but there you go.