Since your aunt is essentially selling you the property for $60,000 less than fair market value, she is giving you a gift to that extent ($60,000), which exceeds the annual gift tax exclusion of $18,000 (for 2024).
As a result, she will need to file a gift tax return.
See https://www.irs.gov/instructions/i709#en_US_2023_publink16784xd0e649
However, unless she exceeds her lifetime exclusion amount of $13.61 million (for 2024), she will not owe any gift tax.
See https://www.irs.gov/instructions/i709#en_US_2023_publink1000292380
