Originally Posted by
WhyFi
That also would have been the 5700-series 105, which was the first year that it went to under-the-tape routing. 5700/6700 had a reputation for eating shifter cables and it doesn't shift as nicely as the generation before or after (which also made the jump to 11-speed).
I can verify the above that I emboldened. I ultimately upgraded to 5800 and said issues got resolved.
In 2011 I paid somewhere between $1200 and $1300 brand new from an authorized dealer. It's hard to say what a used one is worth. If the frame is outstanding to pristine I would probably pay up to $1000.
FWIW mine is the same color scheme as the one linked. I've seen only a small handful of red/white ones in the wild.