Ones in nice shape with the outer box, too, are so rare that they can sell from 50-150 bucks on the bay. It really depends on the unit because the value of the unit can be improved with the box in the offering. For an expensive unit in sweet shape that can translate into a few hundred more than a unit that doesn't have those with it. But for a 100 buck receiver, not gonna get 200 if it has the boxes.
Having the box for a unit offered can give the false impressions that the unit is being sold could be one owner or that it was well taken care of by the owner. This can influence the bidder. There are also those OCD types here on AK and elsewhere that want it all and the box is part of that.
your boxes are worth at least 150, maybe more.