About that, I think I can clarify and explain abit. As a matter of fact Headporter/Porter Yoshida's goods prices are actually pretty controlled in Japan actually, I dun think there's any possibilities they can set the retail prices apart in such a vast difference for the same model. But it's worthwhile to note that usually for conventional products in Japan, they (both wholesalers and retailers respectively) follow an '
open pricing' standard, meaning when they get their stocks from said manufacturers for example Porter/Headporter, even though the manufacturers can have a indicated SRP for the related product, wholesalers and retailers themselves can actually set their own prices, akin in a controlled manner. Take note this standard is only practiced by Japan retailers, doesn't apply to shops outside of Japan.
Like for example, on these 2 websites
here and
here, both are similiarly selling the same model for 19800yen (excluding tax). Granted they are resellers themselves, sometimes usually if its different online shops there's still some chances that there will be minor price differences in the 100 - 1000+yen range, but nothing too drastic in terms of prices like 13500yen and 19800yen apart. It's quite likely the 13500yen price that u saw in the catalog for the BB zip shoulder bag is an old price or the SRP set by the manufacturer, not the reseller shops.