Super,
Like Mad said, those are pretty big valves! The funny thing is that I paid $149.00 for my diverter and they have been going up in price since.
The manual diverters are cheap, but mounting it in a location you can reach and be able to get 6 hoses to it could be a real challenge! Plus the extra cost of longer hoses and extra fittings have to be considered when pricing out the whole project. The electric diverters can be mounted remotely, out of the way, and closer to the hydraulic ports.