How Do I Backorder High Authority Expiring Domains

I'm looking to find a site where I can backorder domain names which are expiring. I think expired domains lose their age, so that's no good for me. I want to obtain aged domains with decent authority then 301 to my money site. I want to be able to search by keyword.

There are many backorder services but not many seem to offer stats.

Use expireddomains.net (free) or registercompass.org (paid) and select Name Jet auctions or Snap Names auctions. Then use the filters to find the domains you want.