For sale:
I have a Detwiler Exact-O-Dial and the black control box. Bought the jackplate, put on a dual blinker trim setup on my bullet and re routed the wiring so i didn't have to use the control box. Looks to be in good shape, and as far as i know it works according to the previous owner, but i didn't and haven't wired it up or used it so i'm not positive.
Not sure what they go for. Make me a reasonable offer and its yours.