I waited till the 5th to pay a visit to Sofmap to sell the Asus T100 tablet off. That's because days ending with the number 5 are called the "Sofmap中古日" which means if you decide to exchange the items for Sofmap points, you get a 5% boost on such days.
I hopped onto a train bound for Kawasaki after work on the Wednesday. There is a Sofmap support center in the Lazona shopping complex where they handle 買取 or purchases from their point of view. I went there and waited for my turn. When it was my turn, I handed over the tablet which was cleanly packed as it came from the factory, telling the staff personnel that the keyboard dock doesn't work properly. He made a serious face and told me that in that case there is a chance they might not accept the tablet at all or return the keyboard dock and take only the rest of the parts. I feared they would go with the former.
He took the tablet in for inspection and told me to come back in 30 minutes. That was short, probably because there weren't many people there and it was a weekday. I wandered around the Biccamera store checking out the cool gadgets during that 30 minutes.