High mileage Jazz's are not a problem.
On several posts I have mentioned that my 2011 Jazz Hybrid has now reached 137k, which works out at 3,700 miles a month, it has been great, even when it had its one fault, a duff battery cell it never left me stranded and managed to start with 10v output.
My concern would be that its a Cat C or D, and that its had a repair job and cheap respray, hence the great paintwork. Just a niggling worry but for under a grand, its not that big a deal anyway so long as the repair is of decent quality and not a "cut and shut". I wouldn't take the sellers word for anything. Its not like you know them.