To help sell the bike, I would raise the saddle to be at least a couple inches higher than the handlebars. Look at other road bike posted.
This is how a good fit will end up being. If shoppers see the saddle slammed down that low, they are going to assume the seller does not know this, and that adds other assumptions, such as seller does not know how to take care of a bike over time. That drops interest of potential buyers.

I am 5 10 and if I were looking for a bike to buy, I would be very interested in this bike, but would see that it is far too big for me and I would move on to the next bike. This is not really for someone 5 10.

Also, almost any road type saddle will give a better impression than the comfort saddle that is on there. You could get a $20 road saddle from walmart on there, or ask the LBS what they have sitting around to sell cheap.