Hestton 5585 rounder

I have a guy who has a hesston 5585 rounder with the moniter. Hasn't been used in several years told me to come get it and bring it home and try it bf I buy it...I'm not a real big operation but I usually have about 40 rolled rolled by a neighbor a year and I square bale about 1400 a year and guy gave me real good price on it was wondering what are some of the thing I need to look for when going threw it and seeing how it works....

Hestton 5585 rounder