Are we spending money wisely & Are things overpriced?

These days money is just wasted. Well... Not really wasted but we're using too much money on things that aren't that expensive to build or buy. For example:
HOK & 360 Architecture spent $1.7BILLION on the Meredes-Benz stadium in Altlanta, USA!!!
The Marilyn Monroe shoe is worth $1 million!!!!
One of the iphones costs $9.4 million!!!
A drink is worth $3.5 million!!!
A notepad is $30.8 million!!!
THESE ARE OUTRAEOUS FIGURES!
Sometimes I wish we had all the tech that we hav today but were for sale for very cheap prices. How can a mirror be worth $609 million!
I think some businesses are strangely minded; they think everyone has the money BUT they don't. Maybe if the prices are too high people won't buy it. Who would want to buy a million dollar drink! And also I thought rich like investing then saving (forget invesing with those prices) not wasting money on things that finish.
PLEASE DON'T SPEND MONEY ON THOSE $$ ITEMS OTHERWISE YOU'LL START SAVING!
COMMENT PLEASE