We found the M & M Store in Las Vegas

The M & M Store is 4 stories high, on the Las Vegas Strip next to the MGM Hotel.  They have M & M's in every color, too expensive to buy, but it was an unbelievable store.  I have looked on e-bay and now I think you could sell everything in the store on e-bay.  However, the prices are so expensive, you may
not be able to have a large profit margin.  They have clothes, cars, dispensers, a whole floor of kitchen things, mugs, cups, dishes of every kind.   I can't find any of the things I really liked on e-bay.
Why aren't there MORE M & M stores?