Saw an ad for a used D90. Guy says it was a wedding gift. Used on honeymoon only. Already has high-end camera of similar quality. He wants $800 with 18-105 kit lens (sells new for $1,200 in Toronto). He lives in my city so I'll meet him in person. Any thoughts on this? I am REALLY nervous about buying used like this. Do I ask to see ID and such? How do I know it's not hot? I suspect he won't have a receipt, since it's a gift. What else do I need to know, or should watch out for, or should ask him? Any help/guidance would be appreciated greatly. Thanks.