I have 3 $1 silver certificates with the blue seal on them.The serial numbers are C26227303J(1935G)- B90926220J(1935G)- V75164184)1935F- They look like they were used a lot but then put away and flattened out. They have some stains and wrinkles but are straight and flat.

Try this site to help determine the value. eBay - silver certificates, Paper Money US, Coins US items on eBay.com (http://search.ebay.com/silver-certificates_W0QQfnuZ1QQfsooZ1QQfsopZ3QQxpufuZx) They probably aren't worth more than $2-4 due to condition. You should indicate the year.