Darwin itself is basically just another UNIX distro. As much as you all hate Apple, MacOS X has NEVER crashed for me (except running my C++ programs, which has NEVER affected anything but themselves). Add FreeX86 or whatever it is and you have a great system for free.
EDIT -
Hows this sound..
Labor: $4
CD: $0.50
Shipping: $1 (should be about that, right?)
Handling: See labor + shipping.
Easy 5.50. Deal, anyone?