A new mac pro in trade doesn't do much for somebody wanting to run PPC software. I can see wanting the best and last generation of PPC software running macs, just like I have a fondness for the last OS 9.x booting mac.

Speaking of x86 pro towers, how are the resale values holding up on the first generation machines? I was wondering if used Apple machines are going to drop in value like crazy to mirror what happens with every other OEM x86 machine (shorter upgrade cycles, less resale values).