This is the only known unit of its kind, there are 63 known Apple I's according to wikipedia. Its also a hybrid of two extremely high selling, well loved consoles, the Super Nintendo and the Sony PlayStation, which far more people used than the Apple I. Case in point - a not particularly uncommon Super Nintendo game is already being bid at $2100 on the same site with several weeks left because it has a, umm, nice cardboard box [0].
I think the console will go for over $100k, but I agree an offer of $1.2M was worth taking.
My SNES games were stolen when I was younger so I only had the boxes and manuals which I kept in pristine condition. I decided to put one box+manual up on eBay and was surprised that it sold within 10 seconds (likely by a bot) for the $100 buy it now price. I suppose I should have priced it higher!
I think the console will go for over $100k, but I agree an offer of $1.2M was worth taking.
[0] https://comics.ha.com/itm/video-games/nintendo/secret-of-man...