One thing that I really wonder about when I read that PPC hardware are so expensive is, what did your Amiga cost when you bought it?
Basically spihunter got it right: that's pretty much irrelevant, as you're comparing the cost of prime computer hardware from the '80s-early '90s to middling computer hardware today. The relevant comparison for an attempt at a semi-modern system is other semi-modern systems, where custom "Amiga" PPC boards clearly don't compare, price-for-performance.
(That said, if you still want to draw that comparison: my A3000 cost me a couple hundred bucks
with an 040 accelerator and NIC, plus another hundred for the RTG card. If I wanted to upgrade to a PPC-accelerated system, I'd have to shell out likely
twice the total cost of the system for a Cyberstorm - or I could pay even
more for a SAM board. Yes, my A3000 is far less powerful - but it's also far cheaper.)
That said, while I myself am not interested in OS4/MorphOS, I'm not in the "PPC is a dead platform and impossibly expensive" camp - there's perfectly workable PPC hardware that can be had affordably, it's just that it's PPC Macs, not Amiga accelerators or any of the existing custom boards. You can pay $100-200 and get a Power Mac G5 setup or a Mac Mini that will
fly with Amiga PPC software, and will be significantly more cheap to expand if you want more capability. Problem for OS4 users is,
OS4 doesn't run on Macs.What I don't buy regarding the "it is two expensive" is when the same people upgrades their PC every 6 month, buy an iPhone, flatscreen TV etc etc etc.
I don't. I've been using my current laptop since early 2009 and will probably continue to use it for another year or so. My desktop is a Pentium 4 system I rescued from the recycle center. And I don't shell out for expensive TVs or smartphones. And I
still say $1,000 for a 1GHz SAM with
one freaking PCI slot is ridiculous.