A domain's backlink history is often the single biggest factor in its potential value, which makes a thorough review essential before any purchase decision.
Look at the Quality, Not Just the Quantity, of Links
A smaller number of genuinely relevant, reputable links is worth far more than a large volume of low-quality or spammy ones.
Check for Topical Relevance to Your Intended Use
Links from sites relevant to the subject area you plan to build on the domain carry more value than links from a completely unrelated niche.
Watch for Signs of Manufactured or Manipulative Links
A backlink profile dominated by obviously artificial link patterns is a red flag worth taking seriously, regardless of the raw numbers involved.
Next step: Use the Wayback Expired Domains to check a domain's earlier web presence as part of your backlink due diligence.