Win 94 in .32-40 manf. 1911

My dad recently died and left a Winchester model 94 in .32-40 manufactured in 1911, condition is about 90% or better. How
can I find a value on it to buy it from my siblings?

good place to start
http://www.collectorsfirearms.com/winchester-model-1894/

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=402981210