One example is the deflation we currently have on computer-based products. The argument that people do not spend their money in a deflation, because the money will be worth more in the future, is simply not true. If people thought that way, they would never buy a computer or a mobile phone, but they do.
Your example confirms what I said before about technological progress. It is not "real" deflation
Add to that the fact that human life is of limited length, so humans have to spend their money before they die. You cannot always wait for tomorrow
You seem to not know people very well. Heaps of precious metals/coins are passed from generation to generation. There is even a term "old money"