Housewarming Gift Idea

Do any of you fab ladies have any ideas for me on what to get a stylish couple as a housewarming gift? I've thought of a plant...and that's all I could come up with. I do not know what their colors are or anything so I'm hesitant to get anything for their decor. This is my husband's friend and I do not know the wife very well, so I'm stumped. Oh, and I don't want to spend that much!