I have selected online, i get most of my diapers from someone i met online, he gets them for me and lets me buy them from him, he also lives very close so it is quite convinient. I occasionaly order online if i want to try a different brand e.t.c.
I am forced to make a run to a local pharmacy on the rare occasion when both my parents are out of the house, as well as my sister. It works for me, although it prevents me from getting the higher quality ones online.
I tend to find small unconsumerladen pharmacies, 1 in particular that happen to carry the items in question. From there, it's opening a door, walking to them, picking them up paying for them and heading home.
I wouldn't risk an online shipment, considering I have some nosy co-habitants, ie: family.
I'm a fan of the wally world diapers, very cheap, (just like me) and I don't have to worry about not haveing enough on hand, just add a stuffer or two and they work fine, as long as you duct tape the lower tapes in place.
I have bought mine online before, but I still live at home with my parents and brothers and they generally take a rather large interest when a big box of who-knows-what shows up on the doorstep. I just generally go to a medical supply store and by them... although the brands and styles arent necessarily my favorite.