Okay so tax time is in a couple months and i just wanted to get an average or median price on some gear

After a redback exhaust 2.5" just pipes, mate got his for 400 fitted anyone know anywhere better?

Redback extractors preferably would be great, but ill settle with pacemaker or w/e if price is substantionally different

Brakes + discs what sorta price am i looking at for them. Fitted, or DIY

I have quiet a large dint in my rear left quarter, needs to be replaced, how much and where from?

And lowering, fitted or DIY how much will springs cost? remember spring length and how low i'll be able to drop my car after i have the exhaust on

Anywhere north of Melbourne, Melbourne itself or even the outer most suburbs would be handy thanks everyone