The sounder is the smaller of the two - both units were in perfect working order prior to being taken out of the boat, this was obviously with a transducer though.
As for the wiring, I have the wire which runs from the antenna to the GPS, as you'll se from the picture this wire isn't attached so just needs joining. The only other wire I have is a plug to the rear of one of the units, could be either as it fits both, however the other end has been cut, its not alot of length so may not be good for much.
I'm guessing a boat with similar wiring can be used if plugs are changed over, pretty sure that's what they did with my boat.
I bought the boat this year in Feb, it was made/sold new in dec 04, when I bought it there was 42hrs on the clock, so the electronics havn't had alot of use, I only used them twice before upgrading.
Cheers