Take care no matter where you buy an X900 machine used. I bought mine used off here and it arrived with a useless head. Easy enough to check how many prints the machine has run, which will give you an idea on the condition of other parts. Easy enough to check it's last nozzle pattern. If there are no clogs you are good to go. Most other problems are affordable fixes, but a new head replacement can be deadly. If you're at 9900 size and greater, you've got breathing room considering head replacement costs but why even go there. I sold my perfect running 7900 on Craigslist just a week ago. Good deal from both perspectives, so it can happen. Read up on the menu system before you check a machine out, so you can scroll around as see what's up with everything before you hand any money over. And don't buy sight un-seen. I don't care if it's from you mom. Not with an X900. Good luck brother