I could get all equipments, materials devices for the "observation home security system in my wife's country house" by the Internet mail-order.
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If I want to get some devices from "Akizuki-Tuusho", the shipping cost becomes expensive. however, It almost equals the cost of round trip to Akihabara station.
I think it becomes cheaper because of saving money to come to the shop.
When I bought a sound amplifying module made in China from Amazon by 300Yen, I was surprised to hear the sound from speakers.
The sound quality is enough for me.
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I know I can get long Ethernet cables and some mounts of devices, however, I was surprised to know that I can also get wood screws pin nails and AC cable lines from Amazon.
Thanks to the Internet mail order, I am able to complete all of the preparation without going to Akihabara and DIY shops.
It seems to be difficult to purchase screws and brackets without watching and touching actual things, however, I believe that this problem is going to be resolved by using a 3D printer in the "three-dimensional printing" at home.
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Amazon is not enough to crush bookstore in front of train stations. I think that they have already begun to destruct DIY shops steadily.
After that, if Amazon begin to start rice, lettuce, and pork pack by the Internet mail order earnestly, all supermarkets in Japan become a subcontractor of Amazon.
That is, from the view of just an endures like me, is obvious.
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I sometimes see the difficulty in walking elderly is going to a super market with struggling.
This is by chance, they don't have a literacy to use the Internet.
However, we who are in prep-old generation can defeat use the Internet.
We will not go to the supermarket painstakingly,
# however, another problem occurs (health life paddle short, ultra-super-aging society),
I think even supermarkets are aware of this problem fully, and they have already started the correspondence.
Given the erosion rate of the DIY shops, I might say,
"Amazon's response is deadly faster than we expect"