I have a silver certificate that is in excellent condition 1935 C, no tears and no folds

eBay is a pretty good gauge on the value of collectibles. Here are a bunch of 1935 silver certs for sale... just put them on your watch list to see what they end up selling for:
eBay - silver certificate 1935, Paper Money US, Coins US items on eBay.com (http://search.ebay.com/search/search.dll?from=R40&_trksid=m37&satitle=silver+certificate+1935&category0=)

They really aren't selling, I checked eBay too, one with a few folds just ended and it sold for $1.00. I would say not more than $7.00, none of these seem to have bids.

A coin shop can give you the book value though