Bought two used R730s. I used warranty checker, one of them says "Out of Warranty", the other one says "Asset does not exist." I contacted support and was told that sales will able to help me if contact them @ 1-855-478-2587, so I did. I've been trying to get hold of someone from 3:00PM to 5:00PM PST but I'm only able to reach their voicemail box. Can I buy extended warranty for R730s? If so, which warranty should I purchase? What is Sales' working hours? How do I get in touch with Sales?