The Duo 230 can be fixed if the caps have not rotted the board. The Dock is worth the money alone, you can always put another Duo in it. You know you can lift the front cover off the dock and insert a Duo it with the LCD open and run it that way and see if it even works.

The Duo 230 case can be worked on and fixed easily. It just requires time and patience. I have fixed many Duo cases in the past and have a Duo collection.

It depends on you, both eventually will need a recap sooner or later if they do work. They will need a recap now if they do not work.