whats this car worth?

[Jonnycash]

Hi,
I just found a 92 pearlie. It has been sitting (covered) for 2 years.
130K
Rebuilt trans (15K ago) now the owner says its bad, but hasn't had it checked out.
Broken rear windsheild and front pass window
Dent in quarter (def fixable)
I have all the parts to fix this car, was hoping to get it for $300...
He's going to call me tomorrow with a price, as he had no idea what he thinks its worth.
Just wanted to know what others thought.
Also curious how hard it is to change the rear glass???
Thanks!