This is a very old post you have unearthed.

Bidasoa is a current Spanish porcelain factory. If you look on eBay current and sold you will find examples. I don't think the name of your pattern is very important; if all you have is one mini sugar bowl, unless there is someone with that particular pattern who is missing same, it is probably not going to be of any great value. But you could certainly list it with a good photo for say $7 or $10; if for some reason it is valuable, you can be sure someone will spot it. Good luck.