Ok, one more thought on your question.. then I'll leave it be.
This seller is listing every item from A. Gartsman Violins. I don't think these are real prices, really. Maybe possible, but close to twice what you might see in a normal auction situation. These are maybe up on eBay as an advertisement... like " look what we have in the store!"
I mean, really... $195,000 for a Tourte cello bow. As great a bow as it may be, it doesn't even have the original frog.. That just seems to be pushing it to me.
This is a strange business.