It wasn't the most expensive gift, but then that's not really the point is it?
My wife was very interested in Amy Brown fairies a few years ago - drawings, figurines, etc. I discovered that a friend from work knew Amy personally. She talked to Amy and told me that not only could I buy a limited edition painting, but Amy Brown would sign it for my wife and send it back to me.
Needless to say, my wife was thrilled. That was a very, very good Christmas.