From all I've read on the boards, 30k is nothing... especially for a 2002 bike!(Over_Easy @ Mar. 19 2007,10:42) Are you looking to simply turn this thing around to make money?
30k would be a concern for ME - why I bought new. If it's lowered and has a full exhaust it's likely got some hard running miles on her as well. Do you have access to all the maintenance records - very important.
You have to look at the quality of person you are buying it from as well. And I would definitely have a mechanic check it out.
Just be sure all the records are right and the bike is clean....
I'd say it's ok!