A long standing trend in professional home design is to mix high end and low end pieces. My low end is pretty low, curb side finds mostly. I like the idea of fixing things up and keeping them from the land fills.
If you prefer new then another way to get the green feeling is to buy an item made from recycled goods. This table is made from recycled aluminum for $489, here is a one from a wine barrel at $504 or a coffee table duo from reclaimed wood for $850.