1911 Singer Sewing Machine

I have a 1911 Singer sewing machine that I have really no idea how much it's worth.  I know its from 1911 because I researched it on Singer's website.  The whole thing is cast iron and wood and is in pretty nice shape for being 101yrs old.  The wooden table has 3 drawers lining down the left and right sides. Also there is another drawer right under the table running the lenth between the vertical drawers.  All of the drawers lock because I found the key inside one of the drawers to lock it.  Also I found a little wooden fold out box full of either parts or accessories, I dont know.  The owners manual that came with it is in rough condition but it says its a Model 27-4 and the serial number reads G1150254. I'm almost 100% sure I have every part that ever came with this machine. I just need help putting a price too it.

Thank You