Garmin GPS III+'s sell for just over $150 on ebay usually with a lot of accessories. Might want to check those out. I have owned my III+ for almost three years now, and I am very happy with it. Waterproof, mapping, sunrise and set, and the map data you can add to it if you need it make it a great unit. I think the only thing I would replace my III+ with would be a GPS V.