Any particular cars considered?

You can check forum sections of www.edmunds.com.
For popular cars, there are many active members talking about "Actual Prices Paid and Buying Experience". Usually you can find such section by going through Forums --> Car makers --> models --> "Prices Paid and Buying Experience".

For example, the following link is for Chevrolet Equinox:
http://townhall-talk.edmunds.com/direct/view/.ef2995e!make=Chevrolet&model=Equinox&ed_makeindex=.ef2995e