The silence says it all !!!
Please don't buy a chart plotter based on price! I've owned Furuno, Raymarine, Northstar and Garmin chart plotters and I find Garmins to have the best reliability, customer service and ease of use. Buying an off brand, IMHO, in the marine industry usually spells trouble somewhere down the road. That said the most expensive units, like my very expensive Northstar, are not always the most reliable. Get consensus on the forums and you'll be in good shape. Having been on this forum for many, many years I'd have to say that Garmin has the biggest fan base..My buddy Kai bought a cheapie "Lowrance" and it died in four weeks! He sent it in for warranty repair, and got it back still broken, even after waiting many months to get it back. He threw it in the trash and bought a Garmin 176 that still works to this day. The Garmin would have cost him $62.00 more at he time he bought the Lowrance.. Penny wise pound foolish!!