I bought noritake sylvia pattern#6603 for 150.00 what is it worth

Hi, ldlovey!

If you click on the following links, you'll get an idea as to the possible monetary value of what you have.

Noritake China Sylvia Pattern #6603 - Google Search

Replacements, Ltd. Search: Noritake Sylvia

I hope that second link is to the same pattern that you have.

Thanks!