They once were highpriced but I've got:
1.67GHz 15" PowerBook
2x2.3GHz PowerMac-G5
2.1GHz iMac-G5 (20")
All in good condition, all 3 combined still cheaper than 1 SAM-460 board (not to speak about a full system).
Whatever price you paid (you got screwed btw), similar speced PC machine is much cheaper. The question is why MorphOS is not available for the cheaper hardware if their goal is to have their OS on cheaper, off the shelf, easily available hardware?
P.S. It's hard to find Macs here and the one's I found are terribly expensive/outdated.