As someone who has done buying and selling of used furniture, I wonder how much of the variance had to do with increasing or waning popularity of an item. When

As someone who has done buying and selling of used furniture, I wonder how much of the variance had to do with increasing or waning popularity of an item. When I heard this on the radio, one of the first items they listed was a Better Homes and Gardens lamp. My impression of their research on that one was immediately to discount what they found because they are particularly subject to fad and fashion, especially with the proliferation of " XX stylish lamps that make you look like you have an interior designer for under $YY!!" type of blog posts.