Advice - PSB Speakers

I have a pair of PSB Image 7PT tower speakers and a PSB Image 9C center speaker that I would like to list on this site. They are in excellent condition.

There isn't a great deal of info out there, nor do I possess the experience in speakers, that would assist me is setting a fair price. So, can anyone with experience in the resale of these PSB speakers, or similar speakers, give me some suggestion on pricing?

Much appreciated.