The Manheim Market Report (MMR) is the premier indicator of wholesale prices. Pricing calculations are based on over 10 million sales transactions for the previous 13 months with precise pricing unmatched by guidebooks.
Pricing is refreshed each night, so you’ll get access to the most accurate prices around. The large volume of data removes the need for statistical interpretation, allowing for pricing calculations without opinion or bias.
Estimated Retail Value, based on actual advertised retail prices, helps evaluate potential inventory
I use MMR on all my vehicle purchases. I find it very accurate.