Vexilar has had color graph units for decades now.(look at their list of past products) The Edge 2 and 3 are actually good units and work well. Price is not the cheapest because they don't make or sell as many of them. You can also get them new for under the MSRP listed. Made in Japan is not the cheapest these days either. A lot of units they have now are filled with crap most don't use anyway. A lot of guys run seperate sonar and GPS units. Price is not as ridiculous as the Marcum RT-9 and all their "modules".