Estimation tools give you an order of magnitude such as $XXX, $X.XXX (low/high), $XX.XXX (low/mid/high). They may value the very same names differently and they are generally not good at valuing brandables.
There are always exceptions but, if GoDaddy values a domain less than $1K, which includes dictionary words without typos etc, there is a high probability that the domain is not valuable. If GoDaddy values btw $1K-$1.6K, there is a high probability that the domain is moderate. If GoDaddy values btw $1.7-$3K, there is a high probability that the domain is becoming valuable as valuation approaches $3K. If GoDaddy values higher than $3K, there is a high probability that the domain is valuable. GoDaddy doesn't give valuations beyond $25K but it says more than $25K. I assume people playing with names valuing $3K+ already knows how to value their domains themselves.
Using GoDaddy & Estibot together with similar sales from NameBio & DNPrices may give you better results overall. You can simply take their average by leaving the outliers out if any.
For the ones new to the industry, I recommend using these tools especially to train themselves in order to make better valuations on their own. Valuation highly depends on what's in buyer's mind for that domain after all. Valuation tools are also helpful for sellers negotiating with buyers who don't know the industry. Hope this helps.