I traded mine in to a local gun store two years ago and got $450.
My 1906 had been re-blued and had the side of the receiver tapped for an old scope.
I cant really tell the condition of your rifle from the one pic. However quality of the action, bore and stock have a lot to do with it.
I suspect, from the pic alone that your 1906 is worth $600 or more if you find the right buyer.
I recommend you have it appraised by a Winnie expert if you think it is better than 90% as those can go for much higher amounts, depending on condition and serial number.
There are some excellent online Winchester appraisel services, but you have to fork over some funds to get a detailed report.
Hope I havn't muddied the proverbial waters.