It would actually be worth much more than that. Closer to 1.6mil, in fact.
Someone recently has listed their Wedding Cake at 20 BTB.
100 BTB goes for 8mil.
8mil/100 = 80,000.
So each BTB is about 80k.
And then 80k*20 = 1,600,000.
So I would say at the very least, 1mil would be nice.