how much is a tulle chassepot 9bre 1841 bayonet worth?

we are wondering how much our tulle chassepot bayonet is worth. It is from the 9th month of november of 1841. It has a serial number of G73754. Has some marks on the front side of the cross guard, but we cannot figure out what they mean. There is a 41 and a 87 and another mark on the front, but we dont know what they mean or what the other symbol is.

around $5000