trade

Debating on a trade coming up need some opinions I got a Springfield saint 5.56 unfired NIB for a SIG P229 elite with about 500 rounds threw it with box what y'all think ?

My dad is wanting to sell his Remmy 1100 or trade to get something more appropriate for my brothers who are up and coming shooters. It's hardly been used and after a good cleaning this weekend is up and running and cycling properly. What kind of trade value or sell value should he be looking at...