UnreportedSales.com is a niche website that I found on Twitter. The site keeps an eye on Twitter and Namepros and documents domain name sales that are mentioned. Sales from venues such as BrandBucket, Daaz and Porkbun just to name a few are documented.
There is a weekly sales report but that has not been updated for two weeks.
The site describes themselves as:
UnreportedSales.com is the leading source for unreported domain sales. We provide the most accurate and up-to-date information on domains that have sold but have not been reported by the buyer or seller. We keep an eye on Twitter, NamePros as well as other venues, to find domain sales that may have gone unreported.
We started UnreportedSales.com in order to bring more transparency to the domain industry. We believe that by sharing this information, we can help people make better-informed decisions when buying or selling domain names.
We’re a small team of passionate domainers who are committed to helping others in the industry. If you have any questions or suggestions, feel free to contact us!
You can check them out here
It is worth noting that Namebio does pick some of these sales up as well as the seller may eventually let Namebio know.
