I buy stainless steel mesh brewing baskets for my tetsubin from them...in bulk.
I think the prices go from $2 to $3.50 depending on the size you need. It's probably more expensive than Japan...but I live in the US, not Japan, and the cheapest equivalent here is about $8.
You won't find artisan pieces there...but that's fine. The pieces are more in the mass-produced line, but they are of quality (and I'll gladly admit to coveting their etched sushi cups
). My experiences with the vendor have been good, and usually very expedient