2008 GT Premium Price question

[swat0712]

Hey guys, new to the forum here, I've been looking for a few months now to get a 'new to me' mustang and wanted to get your opinions. There is one for sale by me, a 2008 GT Premium Convertible with the full Cervini body-kit, whipple SC, and headers (don't remember what kind), he has it tuned to about 520rwhp. The guy is asking 25k for it, it has about 35k miles. I've been doing some research and looking for awhile, it seems like it's a reasonable price but I would appreciate any input, thanks!