im looking at a Z tonight for $1500. All around its in pretty good condition but she says that there is some rust on the quarter panels...is that an easy/cheap fix? Should i be concerned about it? I am going to repaint the car soon, so i guess i could just get replacements. I am going to check the obvious rust spots. Any thoughts?

In most cases rust in the rear quarter panels is relatively cheap and easy to repair, not only can you get a full panel but there are also small sections available. Biggest thing to be watching for is evidence the rust may be in more than just the outer quarter panel itself. Look inside the wheel well around the lip and see if it in the inner fender as well, and be sure to check the dog leg in front of the wheel well too. If it is just in the outer panels it's going to be a lot easier than if it has spread to the inner fender or rocker panel area. Inner fender panels are available , but there goes the easy and inexpensive idea.