Originally Posted by
squeakywheel
1980's steel rigid fork mountain bikes make good commuters.
So are '80s road bikes [on 27" tires in this case]:
I started commuting on this guy. Put several hundred commuter miles on it. Very comfy and reliable, and 26" tires. Eventually moved on because of the front suspension, upright seating, and short gearing.
Both of the above were purchased used for well under $150 each and are great commuters.