I Have a 1957B Silver Certificate. Serial# R38376528A . I want to
Know how much it is worth? It is in good condition. The treasurer
Name is (Kathryn Oday Gransham-or something like that). The other two 1957 Silver Certificates
I have are with a different treasurer name which is Ivy Baker Prist.
Those Serial#s are N88506775A and W93482225A and they are also in good
Condition. Also, how much those are worth also.

Thanks,

Michelle

Probably $2-$3, depending on the level of wear on it.

Here are some references to 1957 Silver Certificate values:
coins.about.com (http://coins.about.com/library/weekly/aa031401a.htm)
eBay (http://search.ebay.com/search/search.dll?cgiurl=http%3A%2F%2Fcgi.ebay.com%2Fws%2 F&fkr=1&from=R8&satitle=%22silver+certificate%221957&category0=)
faqs.org (http://www.faqs.org/qa/qa-7560.html)

It really depends on the buyer. Retail, they are worth about $6 apiece, so if you can find a collector who wants one, that is what they might be willing to pay. But, if you sell them to a coin shop, you will not get more than $2-$3.

Good luck