I am a mountain bike rider and have seen the prices that some of the Dual suspension bikes in the top tier can bring for them. What about the bikes these guys are riding on the TdF. I was working in Sacramento when Lance Armstrong's time trial bike was stolen and it was valued at $10k. What about the TdF bikes what are they valued at? Are they something that with enough money a regular person could source (buy a frame of the right size and components). Or are they custom built for the rider only, measured and designed for them then laid up in Carbon fiber specifically for the rider? Are all the riders on pretty much similar bikes or is there a big disparity between the top named guys and those who are good enough to be there but not a name that is as well known? Thanks.