The Lisa 2 and its Mac ROM-enabled sibling the Macintosh XL are the final two releases in the Lisa line, which was discontinued in April 1985. The Macintosh XL is a hardware and software conversion kit to effectively reboot Lisa into Macintosh mode. In 1986, Apple offered all Lisa and XL owners the opportunity to return their computer, with an additional payment of US$1,498, in exchange for a Macintosh Plus and Hard Disk 20. Reportedly 2,700 working but unsold Lisa computers were buried in a landfill.