i don´t believe that the godaddy price is right, i bought 30 domains which are worth 1-2k per domain. but still hope that they will sell.
Any automated system, or human for that matter, can and often are very wrong. Domain name valuation is not an exact science. They probably do better with things like short letters, short numbers and single word since these are easier to value, but still not at all easy! If interested, I recently analyzed how well GoValue does with NNNNN .com domain names all sold at a single venue. The short answer is
for NNNNN.com on average GoValue does really well, but only slightly better than random in predicting which number sequences will go for more or less.
https://agreatnameforyou.blogspot.com/2018/08/nnnnn-domain-names.html
GoValue tend to place most .com in the $1k range, so
it definitely does not mean that you can (necessarily) get the GoDaddy price! But you might get more, but more likely less, or not sell at all.
Brandables are of course even harder and probably automated are almost worthless for brandables imho.
One big limitation of GoValue is in new extensions.
They treat all (almost all) new extensions equally. For example they estimate the worth of delicious(.)pizza and delicious(.) tax both at $602! Delicious pizza is a great word that could command much more than that in my opinion, but I would not pay (its high) registration fee for the tax extension with that word.
Whenever you get GV ngTLD domain estimate always ask yourself whether the name and extension match. If so it may be worth more, but if not it may well be worthless.
It is
important to realize the different way GoValue and Estibot "thinks". They don't for obvious reasons give their detailed methodology but it is obvious after looking at thousands of estimates that for GoValue they place most emphasis on prior big sales in any extension. For example, if widgetty sold for $15,000 in .net, they would say it is worth more than $25,000 in com and a very good price, probably in thousands, on other extensions, taking into account the average selling price for the different country code extensions. Estibot take a very different approach, where it seems they mainly value how many different extensions widgetty has already been registered in and how often it is searched and how often and for what price per click the term is used on Google Adsense (and perhaps other online advertisers).
In my opinion you should always check GV on a name you are acquiring both to have it tell you other related domains that sold (but are not on NameBio), but also to give a second opinion,
but you should never let the GV or Estibot be your main consideration on worth of a domain name. Another reason to always know it is that increasingly some end users will know about the valuation system and will have looked it up for domains you are selling. Finally, remember that GV estimates go up and down a lot - easily 2x higher or lower a week later. You should sample several times and view it as a range.
ps I have finished but not yet released an analysis of GV accuracy for .co domain names - hope to do final refinements and release tomorrow and will post on NPs.