This was something like 25 years ago, so the economics were different.

Since you don't have to support giant CRT monitors anymore, unless you're one of those people, a hollow-core door does just as well now. Not that they're much cheaper. Nowadays, you have to haunt building demo sites and go dumpster-diving.

You can get doors from a salvage store for a few 10s of dollars

You can usually find them second-hand, though that might get harder as wood prices continue to skyrocket.

Seems cheaper and better to just pay $500 for this: https://www.fully.com/standing-desks/jarvis/jarvis-adjustabl...

I have a desk that's a set of Jarvis legs with a $20 Ikea hollow core table top that I've had for about 7 years. It cost less than $250 (at the time) and it has held up really well.

When a company I was a part of did the door desk thing, we got them from a place that trades in reclaimed building materials. I wouldn't be surprised if Derek went to the exact same place in Portland actually.

I don't understand these prices - 28x80 is more expensive than 30x80 but cheaper than 32x80