(I'm not sure if this is the right place for this topic, so you can let me know if I should post elsewhere.) I haven't seen mention of J-Subculture here as a shopping site for fountain pens, so I thought I would. I have gotten all my Pilot Iroshizuku inks there because of the great prices (less than US $10 - $13 for most colors), but whenever I've searched for fountain pens, only really low-end ones came up. Just today I went to the site again, and this time I found quite a few mid-range and even a couple of high-end Sailors and Pilots.
A couple things I've learned: Approximate shipping prices are listed alongside the item. However, that price is for if you were to order just that one item. But if you fill up your shopping cart with several items and then click "checkout," the next page will give you various shipping options, and you'll see that the total shipping price is much less than if you were to add up the approximate shipping fees for the individual items in your cart. If you go one step further and fill in your address, the shipping fee might actually go down (it always does for me; probably depends on where you live). I just ordered 2 pens and a couple of very inexpensive, lightweight waterbrushes, and the cost for expedited shipping to Seattle was $12. They had two other slower options that would have been $5 and $8.
One other thing I should mention is that the search function is really sucky (not unlike Engeika and other Japanese shopping sites!). Make your search as inspecific as possible (such as "Sailor," not "Sailor Profit" or "Sailor 1911") to find the most items that you might actually be looking for. Unfortunately (or maybe fortunately, depending on your perspective!), when you put in "Sailor," you will also get a bunch of girls wearing sailor cosplay outfits, but if you put in "Sailor fountain pen," some pens will get missed. Anyway, their stock of fountain pens isn't huge, so even if you have to go through the entire inventory, it's not too bad, and you're more likely not to miss what you're looking for.
I've ordered from them several times and have had no problems at all.