PassWind--Not trying to chisel you out of it, just trying to get a good deal.
My wife has a Garmin 60, so it is really my backup. I have a Garmin 78, and, frankly, it is a piece of crap. I've never swore at any electronic device as much as I have that 78. For example, this year in prep for our 75-mi, week-long trip along coastal Everglades, I loaded my routes on to the 60 and my 78. I'm sure I checked the route page, and the routes were listed. Fine. Problem was, as we started out of Chokoloskee, I brought up a route, but nothing came up on the map page. We were underway with several newbies just doing the first leg of the trip to Pavilion, so I turned my attention to them. Besides, I've done this trip so many times, I don't need either maps or GPS. Still I like to have a route, because your GPS gives so much useful info when it is using a route.
When we got to Pavilion (that was the time I flooded my hull by leaving the middle hatch open), and I had time, I looked at my 78 to see why I could not pull up the route on the map page--remember, the routes for the whole trip were listed on the route page. Well, when I examined the route, it had no waypoints, no waypoints!
In fact, none of the 10-12 listed routes for the 7-day trip had any waypoints. The waypoints were in the GPS, they just had not been incorporated into the listed routes that I uploaded from my computer! The same routes/wpts had loaded fine on my wife's 60. Geesus, how can any GPS/software screw up like that! There was at least one other time on my 78 that a single route did not have waypoints, but not a whole list of routes.
My most recent major glitch with my 78 was the installation of a BlueChart chip http://www.westmarine.com/webapp/wcs/stores/servlet/ProductDisplay?productId=435889&catalogId=10001&langId=-1&storeId=11151&storeNum=50157&subdeptNum=50177&classNum=50182
I installed it. Then, the next time I tried to upload/download data to my 78, the Garmin computer software did not recognize the 78. Unbelievable. When I removed the Bluechart chip, the software recognized the 78. So, now, to upload routes & wpts or to download new wpts to the computer, I have to first remove this tiny chip. Yes, hard to believe.
I've gotten used to its poor software and major glitches of the Garmin 78. (It is also harder to read than the 76. Handling wpts is inconvenient.) It is unfortunate, because there are some nice features to the 78, but what an immature product.
End of my rant about the Garmin 78.
The Garmin 76 is a very mature, very reliable GPS. If I could pick up one at a good price, I would do it in the blink of an eye.