I buy from AMIAMI all the time. i also buy from BBTS all the time.
Both are GREAT, though AMIAMI, with shipping ( IF you go air small packet, and you ALLWAYS SHOULD) is always cheaper AND faster than BBTS.
as an example, the skeleton warriors pictured above are 39.99 USD at BBTS.
they're 2140 JPY on AMIAMI, which is ROUGHLY 22$ USD. add 9$ shipping, comes in around 31$ shipped from AMIAMI, and amiami will have them a month before BBTS, And shipping with air small packet takes between 7-10 days.
Typiclay for japanese toys I ALLWAYS use AMIAMI, unless it's something large and heave ( masterpiece transformers) where shipping will KILL the savings.
OR, if it's a Bandai/Tamashii product, as I want to support US distributor Bluefin, to keep the Dragon Ball Z, Mega Man, Power rangers, and Sailor moon lines going, as Showcasing american popularity is helping to keep the price on thise down, and in the case of DBZ, and Mega Man, The American Market sales are the ONLY thing that Is buying them in enough quantites to keep the lines going AT ALL
Also, I buy From Amazon.com when i can get Prime free shipping, but Amazon allways gets things LAST.
So In terms of Speed
1) Amiami
2) Big Bad Toy Store
3) Amazon
In Terms of Cost
1)Amiami
2) AMazon
3) Big Bad Toystore
In terms of Quality of Customer service
1) Sidshow Collectables ( Gotta pimp them)
2) Amazon
3) Big Bad Toystore
4) Amiami ( unless you live in japan)