I'm always amazed at some of the things people just throw out. We still have the original oak entry door with beveled glass window in our home. A friend of mine who also had the original door to her Victorian that she sold over the summer replaced it with, yes, one of those white steel exterior doors with the "antique looking glass" in it. Her real estate agent advised her to do so. I was appalled but she did sell the home rather quickly - maybe she was right. Also, I think she left the old door for the new owner.
On the flip side, we have a younger couple a few doors down who bought their home in the last few years. It's a farmhouse with a crappy replacement front door and they purchased an older oak entry door to install from one of those old home salvage places.