Apple-1 Computers Jump in Value at Auctions - NYTimes.com

An investment to consider, if you have a spare ~$400,000

"After the Apple II went on sale, the company began an aggressive trade-in program, offering Apple II’s and sometimes cash incentives in exchange for Apple-1’s, said Bob Luther, who is writing a book on the vintage machines, “The First Apple,” which he plans to self-publish, with help from a Kickstarter crowdfunding campaign.
In his book research, Mr. Luther called Michael Scott, Apple’s president from 1977 to 1981, and interviewed him about the trade-in program. As Mr. Luther recalled, Mr. Scott told him, “If we had done a better job, you and I wouldn’t be having this phone call.”
“They just wanted the Apple-1 to go away,” said Mr. Luther, who bought an Apple-1 for $7,600 in 2004. (“Mine’s not for sale.”)"

Apple-1 Computers Jump in Value at Auctions - NYTimes.com