Hi, I really want to buy some more Obagi nu-derm blender as used a couple of years ago and it was fab, seen a site where you have to fill in an online medical questionnaire thingy but feel bit worried buying online. Wondered if anyone else has trusted buyers on e-bay for this sort of thing, particularly ones from the united states? I feel bit wary but just read all through e-bays help pages and feel reassured would get money back if it didn't arrive in post or something! Thanks.