Since green beans don't ripen all at once they've usually been rained on a few times. The pods look a little moldy. Do the pods need to look pristine for the seeds to be good? I'm hoping the outside of the pods doesn't effect the seed quality.
I would myself worry more about the seeds themselves. If the seed coat is intact, mold free, and of normal coloration for the variety I would feel fairly confident in its quality. Especially if the seed is mature and dried down without wrinkling.
Western Montana gardener and botanist in zone 6a according to 2012 zone update.
Gardening on lakebed sediments with 7 inch silty clay loam topsoil, 7 inch clay accumulation layer underneath, have added sand in places.
I second what William said. I do notice that after shelling peas or beans I usually have a runny or stuffed up nose for a few days. I should probably do that job outside with a breeze to avoid inhaling the dust you invariably create when shelling.