My cousin has a Sig Sauer M400 with a case, 3 magazines and 3.5 boxes of ammo for $1,000. I know the gun is less than a year old because I remember when he got it. I'm not sure if it is .223 or 5.56 nor am I sure what brand magazines or scope is on it. Is this a decent deal? I'm seeing them online new with out the extras for ~$1250ish.