Let’s say you bought a house for $50,000 40 years ago, and it’s now worth $200,000. Even if you sell the property for $1, you’ll be taxed on 50% of the capital gain, i.e. on $75,000 (50% of $150,000). It’s a considerable amount and you’ll have to pay a lot of tax.
Plus, your loved ones will face the issue of double taxation. Tax authorities will consider your loved ones to have actually purchased the property for $1, so whenever they resell the $200,000 property, your children will be taxed on a $199,999 capital gain ($200,000 minus $1).