My sales are almost always multiples more than godaddy's valuation, from a couple X to well into double digit factors. I closed escrow today on a domain that was 9x the godaddy valuation for a two word .ca domain. Granted, the godaddy valuation was only 500 and change, so its not hard to come up with a good multiple on a low valuation.
Don't forget that GoDaddy only makes money if there's a sale. Its kinda like your local real estate agent. They want to make the quickest sale possible because any variation in price doesn't really affect their commission by much. So the goal is to sell as quick as possible to minimize the effort. So they only care about a QUICK sale, and that means a low price. Their valuation tool is always low. That tool is there to set expectations for the buyer as well as to lower expectations for the seller. That benefits Godaddy. So take their valuations with a grain or two or three of salt.
Graen.com will consistently give a higher value then anyone else for .ca domains, but also they are most in line with my actual sales. Graen also gives two values, sort of a sell-it-quick price and a long-term-hold price. I only pay attention to the high (long-term hold) price. Sometimes my sales are even below the graen price, sometimes above. If you're shooting for a price point, Graen is almost always the highest valuation. The only catch with Graen is that sometimes they won't have a value for more obscure .ca domains such as multi-words, it'll just show an error page.
What are all the various valuation tools out there? Godaddy, domainindex, estibot, pc.domains, graen are ones off the top of my head. Are there any other valuation sites that anyone can think of that handle .ca domains?