On June 28, 1998, Bart Richards married Martha Joiner in Atlanta, Georgia. Because Bart was so happy that Martha became his wife, he purchased a home in Atlanta for $500,000 out of his own separate funds. He immediately titled the home in their joint names with right of survivorship. Bart died on June 28, 2019. The house was worth $800,000 on Bart's date of death. The executor elects to value the home at the date of death. What value will be placed on Bart's joint interest in his estate tax return?