Yeah I bought my skyline that looks exactly like that one with far worse damage (see pics),the underside of the panel overlooking the wheel was even drilled and pushed back.
Even though I havn't fixed it yet Ive got another rear quarter panel I picked up for $100 ready to be put on,Ive got the necessary areas stripped as well, (rear seat,boot lining,left rear tailight,rear bumper) to make the panel beater's job a little easier.
Anyways I'll be going around to get some quotes in the next couple of days regarding the job,will keep you posted