The only ones that might have some value are the old picture box ones (all cardboard with the picture of the model on the front). Later ones with the plastic fronts are almost always worthless. Unlike most toys, MIB Breyers very rarely are worth more than loose. Personally, I just cut out any info or pictures that I find interesting and toss the rest. On the occasions when I've later sold the model, I've had a few boxes or pieces of boxes that got separated from it and those I put out for free at Breyerfest.