If I looked at the right one, they are listed for $699 new. I only found one on Marketplace and they were asking $650, which seems high. The problem you may have is that saw mode has been around for a few years. Even though there currently are not many for sale, you are still somewhat competing with older saws that will be listed for less (because they are older).
I would really highlight that it’s very new. My estimate would be somewhere between $475 and $575. But take good pictures and provide good details. Maybe start at $625, you might get lucky. If not, just start lowering the price until you get some interest.
Good luck!