Couple of issues I should point out:
- Most expired domain tools are still stuck in the PageRank era. These include sites like DropDay, Freshdrop, etc.
- Many domains, either with high PageRank or Domain Authority, have often been penalized by Google, or the sellers have manipulated these metrics through nefarious means in order to boost sales. Any domain with existing backlink you want to carefully audit before purchasing. Buyer beware!
- It's also potentially dangerous to redirect expired domains for the same reason. If you're buying an existing site for traffic and exposure - that's one thing. But attempting to simply take advantage of the existing backlinks isn't always the best policy.
I don't actually know too many expired domain services that use Moz Metrics with the exception of Flippa. NameJet has a nice exportable list of expiring domains that you could look up metrics for using something like the Mozscape API, although this may not scale for individual use.
Hope this helps! Best of luck.