Hello there I am interested in your item for sale.
Sure thing go ahead
I see that it doesn't come with a saddle... would you be willing to come down on the price because of this...
Yes it doesn't I could go down with the price to $580 
I don't know if I can go that high for a bike this old. Though it is rare ... I could go as high as 560...
I could accept 560 but I need you to come pick it up