Used X-Rite iSis for sale

Dear List Users, I would like to sell my X-Rite iSis spectro. This is the ‘small one’, will be six years of age in December, and is in perfect condition. Used twice a month for reprofiling / iterating my two proofers. Do anybody have any idea how much it is worth? If someone needs it, I would be more than happy to sell it to fellow ColorSyncers. Kind regards, Peter Nagy Colorcom, Budapest