Without a link, or pics and parts specs and details, couldn't tell you anything about your find.
You might look thru these threads
https://endless-sphere.com/forums/search.php?keywords=ebay+enduro&terms=all&author=&sc=1&sf=firstpost&sk=t&sd=d&sr=topics&st=0&ch=300&t=0&submit=Search
https://endless-sphere.com/forums/search.php?keywords=enduro&terms=all&author=&sc=1&sf=titleonly&sk=t&sd=d&sr=topics&st=0&ch=300&t=0&submit=Search
https://endless-sphere.com/forums/search.php?keywords=eeb&terms=all&author=&sc=1&sf=firstpost&sk=t&sd=d&sr=topics&st=0&ch=300&t=0&submit=Search
to see if any of them look like the one you saw on ebay. Note that not all results are going to be relevant. :/