What happens to the price of a single good over the lifetime of that good is not a useful lesson in what happens as a result of broad, economy-wide deflation.
Frankly, the issue with purchase postponement isn't the biggest problem (although it's certainly a concern, as is hoarding). In my mind the biggest problem is wages being inelastic downward. As all prices deflate, income for employers goes down (or thought of another way, the value of money goes up which makes each employee more expensive). That forces two options: fire employees, or cut salaries. The latter is very difficult. So instead you see the former.
So you get broad based increases in unemployment. That leads to reduced consumer spending, which forces prices down even further, and so on.
As for real life examples, perhaps the Great Depression qualifies?
http://www.economist.com/economics-a-to-z/d#node-21529653
If you're looking for a more contemporary example, Japan experienced its own deflationary spiral:
http://www.forbes.com/sites/jamesgruber/2014/04/27/japan-def...