Vin History advice

[StockStar]

A buddy of mine is look at the hummer in question, but the vin info appear to be a little vague. It appears that the previous owners registered the truck and nothing else. Also, the gap in reported mileage got my attention. Take a look. Should he be concerned?

H2 2005 with 52,xxx miles
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1st 2004. Owner length of ownership 1yr 6mo. Last reported odo 8520miles

2nd 2006. Owner length of ownership 3yr 7mo. No mileage reported

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12/92004 8miles California Title issued

6/06/2006 no miles reported titled issued

6/13/2006 8520miles For Sale

7/17/206 no miles reported titled issued or updated New owner report

8/31/2007 no miles reported registration issued or renewed

10/30/2008 no miles reported registered issued renewed

9/30/2009 no miles reported registration issued or renewed