Hi Tom,
It is the same model that many on here built back in 2009.
This is the thread that discussed it at the time:
http://www.iceinspace.com.au/forum/s...ghlight=Orrery
The project wasn't without it's problems, which may explain why your model is still in bits in a box!
The all-up cost was about $800+ from memory.
That being said, the finished model worked well and looked a treat.