I have a database of the Ironman bikes, broken down by model, sold on eBay over the last couple of years, about 120 bikes or so. It's in MS Excel form, and I can send a .pdf via email if needed.
You can see the averages, which are pretty darn consistent, and the highs and lows. I did not describe the bikes very much, but you can imagine the condition based on the price.
If interested, no need to create a thread, PM me with your email address, and it gets sent.