You can find a used Marine GPS on ebay or Craigslist. Amazon is a good place to find a GPS too, because the site is secure and you can be sure that your money is going where you think it is.
A good place to shop for a marine GPS is Calibex. There is a large variety to pick from and the prices range from $129.99 to $499.95. Best Buy is also a good store to purchase a marine GPS.
There are many good places one can look to purchase a Garmin Marine GPS. Some good places include 'Best Buy', 'Amazon', 'eBay' and from 'The GPS Store'.
A Marine Chartplotter GPS is used by boaters and watersportsmen. This GPS can be used to track the shoreline, measure the depth, and locate various harbors and marinas. http://www.amazon.com/b?ie=UTF8&node=551462
The best place to purchase a used Marine GPS is most likely on eBay, or a site like it. You can also consider looking in your local classifieds or at a pawn shop.
The Garmin Marine is a GPS Navigator. This GPS is typically used for boating. You can purchase this item online from stores such as Cabela's and retailers such as Amazon.
The the Garmin GPS 72 is a waterproof marine GPS unit.
There are many retailers that offer marine GPS products, and it is very easy to locate them on Amazon, Ebay and BestBuy. However I would recommend purchasing one from a specialized retailer such as WestMarine as they can offer valuable advice according to what marine GPS would be the best choice for your husband's little boat.
These devices are mainly used in boats. These devices use GPS to track you on the body of water you are currently in in your boat. They work similar to GPS systems used in cars.
A marine GPS is another word for a fish finder. They normally tend to use sonar. You can buy one from http://www.gpscentral.ca/products-marine.html. There are other alternative places but this one has just about all of them.
Basically marine GPS is a kind of GPS that helps in planning route whiles on sea.There are so many places to learn about marine GPS, some of these places include discoverboating and bennettmarine.
You can find the difference between marine gps systems and garmin gps systems on the following site: http://www.secrets2business.com/the-difference-between-marine-gps-handhelds-and-their-bigger-brothers/. They have good descriptions.
The Magellan Marine GPS is fairly priced at $105.36 (new) and $104.16 (used) through Amazon.com http://www.amazon.com/Magellan-Meridian-Marine-Waterproof-Hiking/dp/B00005OLY9