Here is another look at some domain name sales that are not recorded on Namebio. The reason being these were generated from the GoDaddy domain appraisal tool, so more than likely these were sales generated through Afternic or Namefind.
When you search for a domain name using the GoDaddy appraisal tool, you will see comparable sales on the right hand side, you will also see more when you scroll down to the bottom of the page.
So I started taking a look at the comparable sales and then I put that name into Namebio and check to see if it was recorded there. I would imagine Michael at Namebio will not be able to add them since there is no date. Here was the first list of domain sales. and here is the second list. Third list here. Fourth list here
Note some of these sales could be more than 10 years old.
slick.com more than $25,000
faceq.com more than $25,000
Robots.net is a developed website that deals with tech in general not just robotics.
Labyrinth.com is parked at Uniregistry.
Teachy.com looks to have sold in 2017 it redirects to the Uniregistry home page.