I think drugstore.com has a nifty deal. I didn't look too hard at the picture though because I like surprises. Spend $45 in the green & natural department and get a tote bag filled with samples. I bought some health & beauty stuff and some snack foods. A box of diapers would have worked too though. Link to the deal
Ulta.com seems to frequently have deals where you get a sample bag. I have just been using their "favorites" feature to mark things I want to buy and then when they have a good deal like this - spend $25, get free shipping and free sample bag - I place my order. That way if I go to my list and don't see $25 worth of stuff I want I can ignore the deal until next time. Because there will be a next time before you know it.