Doulton Bread

How do I value fine English Bone china from late 1800′s to early 1900′s?

Hi… my 86 year old mother recently passed away and while going through her estate I have found some very old fine china in perfect condition. I beleive these pieces belonged to her grandmother which would make them from the late 1800′s to early 1900′s.
They have gold numbers on them, are edged in gold and are from England. The pieces include:
Royal Doulton Candy dish I think Zunday Zmocks D5680 Regd Australia 16304
Shelley England S2903/1 Partial dinner service
Royal Crown Derby English Bone China “Derby Posies” XXXVI R HJ Cup Saucer, Creamer Bread/butter plate
Colclough D4 Cup and saucer S or J[?] 9801
Royal Vale Cup and Saucer J[?] 5/3
James Kent Ltd London “Pearl Delights” candy dish

You can try entering the information about each piece separately into a search engine such as Go ogle shopping. You can also bring the pieces to a reliable antique dealer for an evaluation./

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