are you buying the chip used? i bought the premium chip and paid 150.00 and its a step under the platinum chip. ive got the 788 ci and the map takes pretty near the whole screen and shows about a half inch of the sonar readings, which i dont like, but the map itself looks is pretty nice and is easy to see the depth changes.ive only used it on green one time and put it back in its package for the reason above. i got it this past march and im selling it for 85.00. let me know if your interested.



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