要比较全面的评估一辆二手车的value，除了查autoTrader之外，还应该查一下Canadian Black Book Consumer Guide 和Canadian Red Book。如果是从网上查的话，需要一点小trick，介绍如下（转贴）：
Surprisingly, you won't find them at www.canadianblackbook.com, although you can purchase the Canadian Black Book Consumer Guide ($10.95), a print edition of Black Book which is sold to the general public. This guide contains both average trade-in and average retail prices for used vehicles from 1991 - 2000.
To find Canadian Black Book trade-in values online, go to either www.daimlerchrysler.ca or www.toyota.ca. Click on any model car and, in the navigation menu on the left of the screen, select the link titled, "Trade in value" at DaimlerChrysler or "Appraise your trade-in" at Toyota. These links launch a new window which originates from www.canadianblackbook.com.
These prices are what you can expect to get from a dealer for your old car. Select a year, make, model, options and current kilometres and the pricing engine returns a value range. A dealer may offer you a price within this range - after deducting for repairs or reconditioning that would be required to sell the old car.
For retail prices, you still need a print guide like the Canadian Red Book. Until recently, the Red Book was not available to the general public, but now it can be ordered online at www.canadianredbook.com. There are two books of interest, depending on the age of the vehicles listed; the Canadian Red Book for vehicles from 1994 to 2000 (published monthly, $11.95) and the Canadian Older Car and Light Duty Truck Red Book for vehicles from 1982 to 1993 (published quarterly, $22.95).
If you are shopping for a print guide, be careful. Make sure the guide you buy contains Canadian prices. There are many US guides available in Canada, including the Kelly Blue Book, Edmunds Used Car Price Guide and VMR Standard Used Car Prices, but none of these is of any use in Canada.
Whether using a print guide or online price guide, it is essential to remember that used car prices are always moving, generally downward. There is no better guide than knowledge of the local market. If you are contemplating buying or selling in the near future, start now by buying used vehicle advertisers like the Auto Trader or checking used car web sites like Driving: Canada.com, Auto123 or Autotrader. Get a feel for what other people are asking for similar vehicles to the one you want to buy or sell and estimate that a fair market value is something lower.