Fire can yoga

How do I tell if a painting or ceramic or other brickabrack is worth anything? - fine china for sale

I know is that found in the ceramics, a stamp on the basic question of whether know as the mass market, but how do you whether these things old oil paintings signed (with the name of a person's name or last name only) of value or if he is a flea market or an element of thrift store donation?

What about the old porcelain and crystal? How do I know about these coins?

Are there any books, web pages (outside of eBay), or to find how this information and it is suggested that if you go see someone, you will in such cases, as you know if they are reliable or do effects of power, such things ?