I got a referb from electronicsoutlet also and it works great. They are reputable and shipped it out very fast. BUT, BEWARE Other sellers, the first time I ordered a new one from a different seller, I never received it! The thing to do is - as someone else advised - check the feedback. Also look at the lower right and see what the "Check how you're protected" banner says. You are looking for "Up to $2,000 in buyer protection", if it says "$200" or less that you are paying, move on to another auction.
Happy bidding! I love my AVIC-Z2.