I have a Garmin 3006, has updated firmware with G2 charts of Mass & R.I. Other maps, can be added. Almost, new like condition, with cables & GPS ant, and mount. Also, I will add a 32 meg chip with the USB card reader. that is normally extra. Is has a 6.4" screen, can be networked, radar and fish-finder can be added. $400.00 I want to upgrade to a NMEA2k unit for AIS capabilities.
It is 4yrs old, and at that time I paid $1,475.00 for it.
Any questions, just ask!
GPS
https://buy.garmin.com/shop/shop.do?cID=168&pID=248