To save anyone else the searching: parent's definition of "price-competitive with professional furniture" seems to be $500-$1000 used. I can't find anyone listing a price for new.

Yup, mine were 650 EUR a piece new with the drawers shown in the other comment from https://trolley-dolly.de/ (one of several shops I found), though it looks like they now stopped with trolley+drawers bundles.

I was looking at the used market at first, but it turns out that a lot of those are enthusiast collectibles and don't seem to be cheaper than new ones when in good condition, i.e. airline branding bumps the price up, sometimes considerably.

It's obviously all >IKEA, but if you compare this to stuff like Lista office drawers or automotive workshop trolleys it's maybe half, and much closer to the pricing of lower-end stuff from a big brand chain toolstore--but with higher build quality, superior rigidity, better wheels and brakes, and being lighter to move around since the application is weight-conscious. Add the subjective neat-ness factor and I think it's worthy of consideration :)

I found some on sale for around $300 on Etsy. Shipping is very expensive, so they would probably make sense only if you can manage local pickup.