In case the link I posted isn't showing up correctly, just navigate through their webpage under the Aston Martin Tab, there's only 1 M3 in there.
I'm don't have much knowledge on M3's myself, but here are the mechanicals posted on their site.
I've spoken to their sales guy, and he says this car was bought by the previous owner at 16000km wanted to bring it to tracks, hence the DINAN mods, but didn't seem to take it out to tracks much there for traded it in at 18000km for an Aston Martin as a gift for his wife.
Question: so is this car Double Clutch Transmission 7 speed or is it some other variation?
4.0L DOHC 32-valve V8 engine w/double-VANOS variable valve timing
Light-alloy cylinder head & crankcase
Oil supply w/lateral force control & quality sensor
Comfort start w/start/stop button
Electronic throttle control w/M power button
Self-adjusting clutch (SAC)
Variable M differential lock
Dynamic stability control (DSC) -inc: automatic stability control & traction (ASC&T), cornering brake control (CBC), dynamic brake control (DBC)
Rear wheel drive
M3 specific sport suspension calibration
Double-pivot strut-type front suspension
5-link rear suspension
Front & rear stabilizer bars
Rack & pinion pwr steering w/Servotronic
4-wheel ventilated & cross-drilled pwr disc brakes
4-wheel anti-lock braking system w/electronic brake force distribution (EBD)
Split twin exhaust w/chrome tips