[exalsG4]

I don't know of the GE Octane and Octane2 had specially modified mother boards to allow them to interface with GE MRI machines, but Mashek is selling a GE Indigo2 mother board for allot of money: https://www.ebay.com/itm/SGI-Indigo2-Mot...XQKAtRJxS9

You may want do do some research on this, as this may be a very nice find!

I found this complete GE Octane2 on ebay for almost 4k$... https://www.ebay.com/itm/SGI-Silicon-Gra...Swv9FXgweW

Onestly I think they're worth so much because of the configuration already setted and compatible with old GE MRs software. I also own original and sealed GE software for IRIX. I'm wondering how much that is worth