The quality control just does not seem to be in place for open box. I purchased a make mini for $99. Printer was great, but the switch was bad. 3 MP10's the z axis bar would not come down. 2 replacements, one was missing the actual control box (screen). The 3rd one the hot end was broken. All of them had the wrong software on the sd card, so the initial install of cura did not have the mp10 printer.