I wrote about these a couple years ago, but with a number of arrangements at 50% off currently at Horchow.com, it seemed like a good day to revisit them.  I have the peony arrangement (not on sale) in my dark NYC apartment, that never fails to fool.  Even a savvy decorator and a celebrity florist thought they were real.  Impressive.  There are ten different varieties in Horchow's 50% Spring Values sale (umm, note to Horchow: "Spring" ended May 31 in this hemisphere); more varieties at smaller savings in the decor section of their site.