I have a Helix 7SI gps KVD edition for sale. The box has been opened, but it has not been installed. Customer ended up ordering another helix 9 and sent this one back to me. Retail is: $699.00 I am asking $640obo shipped to your door. Plastic is still on the transducer and unit screen. IM me or email me at rmpllc@aol.com if you are interested.