It looks like a matter of cost risk for the individual dealers. Sales dropped from 55,000 in 2007 to 28,000 in 2008 and halved again in 2009 and 2010 and sales were down to ~6,000+ final count not in for 2010. The dealers apparently do not want to take the chance on having many of these vehicles on their lot and then end up not being able to sell them at list price.
en.wikipedia.org