I'm sure that would sell. There is a reason they show it with an adult in the picture and not with a child. Adults spend crazy amounts of money on Lego.
Here here. Lego prices today on some sets are just out of whack compared to how they were in my childhood. It feels like Lego's biggest market is now grown men with disposable income who buy overpriced sets for themselves because nostalgia. A guy form a former workplace has a room just for his Lego (no kids).
I think they could go even higher than $200 and it would still sell the same.
Data shows prices have probably decreased since you were born (assuming you're over 25 years old): https://www.reddit.com/r/dataisbeautiful/comments/15flwte/is....
Then I was mistaken. Apologies.
Sometimes I imagine setting up a LEGO storage wall plus desks, but that would be for building and not display.