> that does not actually work with original hardware
Well, if you were to populate it with the chips from your old board, it would work. So as a replacement part if it was just your PCB that was cooked, it's not a terrible option. Just having the option to get such a brand-new ancient part is still valuable, regardless of cost.
On the bright side, I could spend $500 more on Mac Pro wheels.
I definitely wouldn't trust it if they're not certifying that they work and providing the exact revision of the board. Even boards that appear to have the same layout may be different - it was common to screw up a trace layout on a first version and need to manually solder bodge wires during assembly.
They are providing the specific revisions:
Lunar Lander, Warlords (Rev D), Black Widow (Rev A), Gravitar (Rev C), and Major Havoc (Rev D).
And their site also states "These boards use the original bill of materials, follow the original schematics, and can be used to replace damaged original boards by using the original parts from these boards."
Well, if you were to populate it with the chips from your old board, it would work. So as a replacement part if it was just your PCB that was cooked, it's not a terrible option. Just having the option to get such a brand-new ancient part is still valuable, regardless of cost.
On the bright side, I could spend $500 more on Mac Pro wheels.