>>1677632I tend to just use two:
http://www.amiami.com/for new products
https://ekizo.mandarake.co.jp/for used goods
They also have hentai and smut mangas
You'll either need to know japanese (and be able to type it) or use a translator (and copy/paste) to navigate the site.
There are plenty of other places out there to get such products (pic related).
I'd more suggest trying to figure out what type of product you want, then see who has it. Do you want 'toys' or 'statues'? What series, and what series is more likely to be lewd++? What manufacturer is more likely to cater to you're desired product?
While I don't have all those answers, they're good to look at. Once you find a product you like, look up more on the maker or the series to see if there's more of what you like to go along with it.
