I have a lightly used (3 months) GHL Doser. Does not come with original box however, I still have all original manuals. Also comes with a custom acrylic wall mount shelf and a package of 13ft cobalt tubing. See below is missing one of the plastic adapters as it arrived broken. They can be purchased for cheap if you need all 4 dosing heads.
Asking $400 shipped for the package
Asking $400 shipped for the package
