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Easy, look in the four corners of each note, you will see numbers in each of the corners, that's the value of each note. Only kidding, First you need to know the condition, then check e bay for current and past auctions and some of the other auction sites. Bill Collectors
lol! I like your sense of humor! I have been told that the $1 Canadian is worth about $40-50. I will ask someone at the local coin shop to see what they think about the others. I am learning something new every day. I thank you and everyone else who is being helpful and supportive.
Seriously, Your most up to date pricing would be e bay and other auctions. It's always good to laugh once an awhile, it will keep you healthy. Bill Collector
The 1928 $20 has a book value of $75 in Extremely Fine condition. The 1957 silver cert is about $3-4 normally; but the unusual serial number might get you $10 from an interested buyer.