2013 Giant TCR Advanced SL4: $2000 out the door. Way more then I planned on spending...mostly cause I'm cheap not because I couldn't afford it. But it was demo and bought it a few months before 2015 came out so it was basically a two year old model with "old" 6700 Ultegra. But I do love and and don't plan on buying another bike for a long while.
Other bike is 1989 Centurion Ironman Dave Scott I picked up for $275, added 5700 105 group for $400 and wheels for $200 and sold stock take off parts for about $150. So I'm into that bike for a little over $700 and honestly enjoy it as much as the fancy carbon