well, let's break it down and see what kind of value we can find shall we.
Age: 3 1/2 years
Nutrition API = 36 Exact Global searches per month
Nutrition = 246,000 Exact Global searches per month
API = 368,000 Exact global searches per month
Alexa: No Data
Phrase Definition: An application programming interface (API) is a specification intended to be used as an interface by software components to communicate with each other. An API may include specifications for routines, data structures, object classes, and variables. An API specification can take many forms, including an International Standard such as POSIX or vendor documentation such as the Microsoft Windows API, or the libraries of a programming language, e.g. Standard Template Library in C++ or Java API.
This particular phrase isolates nutrition as the primary variable in data collection and aggregation.
Currently Developed: No
Previously Developed: No records on file
Potential: This domain does have some nutrition market potential with food related api's starting to trend.
Reseller Purchase = Low to Mid $xxx
End User Purchase = Low to Mid $x,xxx
In conclusion: At the end of the day all domains are really only worth what the buyer is willing to pay or what the seller can convince the buyer the domains worth in the presentation. Other than that, nor appraisal evaluation can be 100% accurate and mainly based on personal experience and opinion.
I wish you luck on your sale,