Once it goes “out of print” it’ll probably go for quite a bit more on the secondary market, to be sure.
And yeah, it’d be $909 under the old “10 cents a brick” rule of thumb. Probably in part because this appears to be made of small bricks. Looks like there’s never been a lego set at over $799 MSRP either
So whenever the first $900 lego set is released, it will be a record breaker