I bought these from another local reefer for $320 in November 2019. It was four months old when I bought it. I started my tank a month ago so these units have seen five months of usage. They work great, but they are too powerful for my 90 gallon tank; even at 30%. I am going to replace them with the XF330. Price is $290 firm. Pick-up in Newton or you pay shipping. Thanks