Well they were hugely popular before the 2008 paint job, which many seem to think is a very much improved paint job, I certainly do and I have a 2007.
But I see the draw of those ebay "track" bikes, especially now that they've upgraded to "alloy" by the infamous "No-Name". Gotta wonder what they used before "alloy", and

Go used if you don't find a good entry level bike, the specs for those ebay bikes say it all.