I can’t type in Japanese.(Sorry about my messy writing)
Proper prices of Tshirt at UNIQLO are 1000yen or 1500yen.
However most of weekends, UNIQLO has Big discount,so people can get T-shirt around 780yen(sometimes much cheaper...)
So I will choose(also recommend to other people) UNIQLO.COM NOT your business.
I used to work at UNIQLO and I have great memories there.
Also I know how much the company make effort to develop itself.
I don’t like the company would be treated with disrespect.
If I found any business like what you are thinking,I would tell the company right away.