I'd say do it. You can tell the rest of us how they are and if they suck you can resell them for a profit. It says it's a cash pick up, so there's no risk of sending money and then not getting the pads/diapers. I say go for it.
Those aren't cases...They are regular bags...If you do get them, try to do it in a public place or something, have someone that could check in on you, don't go in his house...Cuz there are a lot of creeps out there