So Dirk takes your order, goes out into the Tokyo retail market and buys what you want (but can't otherwise get outside of Japan), packs and then takes it to a post office for shipment to you. For this his prices are 30% higher than Yodobashi. Sounds like a great deal to me; most retailers operate on a 100% markup over their cost.
You'd better do a really fine job buttering up Rachelle if you want her to start a business that competes with Japan Exposures on smaller margins!
I don't know if that's what Dirk does, but he is basically providing a service to foreigners both in and out of Japan to get a hold of products that are otherwise unavailable to them. So I think the markup is reasonable and in line with purchasing other goods for the foreign market in Japan. However, I live and work in Japan, earning and spending yen, so the prices are normal to me -- but I think quite shocking in other currencies once you convert the prices over...I have no idea how long we're going to have a strong yen, but for the moment it works well for me.
I don't know if people are being serious or not, but as for being a supplier myself...besides the logistics, I don't live in a big city like Tokyo, Osaka, Nagoya, etc. where I can purchase these products. As it is, I stock up on chemicals and paper the few times a year I make it to Tokyo or Fukuoka or similar cities that have a Yodobashi or Bic Camera store in town.
We don't have anything like this in Kumamoto:
I know it's film, but I don't have any photos of the paper section, which is in another building. These photos were taken at the mecca of photography, Yodobashi Camera in Shinjuku, Tokyo last summer. Now it's only a single wall cooler full of film, but as little as three years ago there were at least 3 big coolers in the same location:
click. The film section (now) is a little decimated but the paper section (starts at photo 16/40 with the Fuji paper) is still pretty accurate.