As a collector I am always interested in having boxes, or even getting a better box thn one I might have. Its probably not a huge market but some games will be greatly enhanced in value if they come in a box as opposed to just having the contents, ditto if the box is pristine rather than dented or creased. I don't resell mine but I would still look to get a better box than one I had for quite a few games.
Whether its worth the effort is probably dependent on the nature of the game. If eg what you have are games I can buy for not terribly much on ebay and there are plenty of them then perhaps its not worth the effort. But if the whole game isn't readily available or sells for a bit more than the avergae, maybe its worth making a list.
You should probably be prepared to send photos etc regardless of how you list - I would certainly want to see a box I was buying - but maybe you could list the boxes with a condition description (as new, good, fair, poor etc) and then offer to send further info and pictures to anyone interested.
Hope that helps and feel free to follow up