I cannot comment on the lens you mention. However, let me share my experience with you.
I purchased three 28mm Vivitar lenses. All were in very good condition. Tokina manufactured two of the lenses and Kiron manufactured the third. I expected good image quality from the Kiron and was not disappointed. I did not expect the images from the Tokina lenses to come close to the Kiron and one lens did not. However, I was very surprised to discover that the images from the least expensive of the two Tokina lenses were slightly better than the Kiron.
Bottom line, you may not be able to tell if you have a good Vivitar lens until you actually use it.