I would only take it if the backlinks are really worth it... this is mostyle a manual process... Any metric can be manipulated ... So always actually check the backlinks manually on the website/service the metric comes from !
what you should actually check here is these websites links rather than their metrics,
how good are the links pointing to them, from which websites and specific pages/posts,
you might want to check the domain usage history, traffic history and the difficulty of the top keywords it was ranking for,
that would help you get a better idea about the domain and how good its links