Buying an expired domain with hundreds or thousands of links pointing to it is like buying a used car. Check the links out first because you could get a lemon. Since literally thousands of domains expire every day, don’t rush out and buy one before doing your homework. Use Moz’s tools to check a domain’s authority and backlink data before buying the domain. Never rely on someone else’s metrics to make your buying decision.
Before buying a domain, check to see if it is in Google's index. Don't buy an expired domain if it isn't indexed. The previous owner may have engaged in black hat SEO and Google deindexed the domain. If the domain is inexpensive and has a great, short .com name, it might be worth buying. Disavow bad links, create content and use a Google Reconsideration Request to ask the search engine to crawl the website again.
If you're considering buying an expired domain with backlinks, check the links carefully. They should come from trustworthy sites, be contextual and related to your niche. Again, do your own research and don't rely on someone else's backlink info.
Learn how previous owners used the domain with Wayback Machine. If you see it was a spammy article directory, link farm or just a low quality website, don't buy the domain.
If the links check out okay and the site isn't deindexed, you could have a winner. If a domain comes up for auction which checks out and the name is ideal for your niche, you can always buy it and use a 301 redirect to point it toward your existing website. This is the easiest way to get the SEO benefit of an aged domain. You can also turn the new domain into a microsite with a link to your main domain. Use it to hold contests or for special offers. For more information click here https://www.reddit.com/r/SEO/comments/c2gbgg/newbiepurchasedanexpireddomainwith100k/.