The old Lowrance lfp-250 fish locator I got on ebay isnt working , but the transducer and its cable are in pristine condition. I am not positive but I believe it would work with the older green box models as well. If anybody were interested in it I will sell it for $10 plus 5 for shipping. To get the unit also for parts or repair it would be just a couple more added to the shipping cost. Let me lnow if you are interested.