My latest; 
7-months old; purchased via eBay July 2013..
Very slightly used 2012 TREK Project One, US-build, Madone 6.9 with Dura Ace 9700 Di2.
Paid $2,100 + $100 S&H ($2,200 total)
See specs below;
Build Date:
2012 (Nov. 2012)
Make:
TREK
Model:
Madone 6.9 Project One series
OCLV2 Carbon frame, 58cm, H2 Geo
US-build
Fork/Headset:
Bontrager XXX E Lite
Cane Creek IS-2
Crankset/Bottom Bracket:
Shimano Ultegra Compact FC-6750, 175MM 50/34 BB90
Pedals:
Shimano Ultegra PD6700
Drivetrain/Cog/Chainring/Chain:
Shimano Ultegra CS6700 12-25T
Derailleurs/Shifters:
Shimano Dura Ace Di2 7970 series w /Dura-Flex Shifters
Handlebars/Stem:
*Bontrager XXX Aero OCLV Carbon, and XXX OCLV 31.8 Stem
Saddle/Seatpost:
*Bontrager RXXL Paradigm Carbon, 148mm, 0-offset Carbon seat cap, 135mm.
Brakes:
Shimano Ultegra BR6700
Wheelset/Hubs/Tires:
Bontrager RXL Scanoium Clinchers,
*Vittoria 700/23 EVO Corsa II 340TPI with latex tubes
Accessories:
Bontrager RXL Carbon Bottle cages, Garmin Edge 810, Knog lighting, TopPeak Seat Bag
Weight:
14.6 lbs (6.7 kg) with pedals and lighting, water-bottle cages and Garmin Edge installed. (
13.2 lbs nude)
More Info:
Built Nov-2012, MSRP >$8500, purchased off of eBay in June 2013 from original owner for $2100+$100 S&H; verified legit to include change in registered ownership with Trek.
*Note: Not to be misleading, I changed the saddle, handlebars and tires/tubes after purchasing it from the seller on eBay. Saddle and bars were part of personal choice and fitting, and tires only due to the rear having a flat spot from being ridden on a stationary trainer. Bike came to me with OE Bontrager RXL Affinity saddle and RXL bar set. These upgrades added $700 to my all in cost which now sits at $2,900.