You should probably either go to their website OR contact an experienced car collector.
No
Depends on the year, ones dated 1971 and later are only worth 50 cents. Ones dated 1965-1970 are 40% silver and worth about $4.50 in melt value. Ones dated 1964 and before are worth about $11.50 for their silver content, though some years/mintmarks make them worth more than their silver value.
keep it for a collection
Actually, not just before 1969 but any half dollar dated up to 1970 contains silver so it's definitely worth more than face value. Halves dated 1965 to 1970 were made from 40% silver so they're worth about 1/7 the current price of an ounce of silver. Except for 1970 coins that were sold only to collectors, these dates don't generally have any extra collector value. Halves dated 1964 and earlier are 90% silver so they're worth about 1/3 the price of an ounce of silver at a minimum. Older dates (1940 and before) very often are worth even more to collectors but you need to know their specific dates and mint marks.
The US didn't print any $1 bills dated 1970. Please check again and post a new question.
The US didn't print any $100 bills dated 1970. Please check again and post a new, separate question.
The value of a Sidney Nolan print "Death of Constable Scanlon" dated 1970, number 403 of 2500, can vary depending on factors like condition, market demand, and authenticity. It would be best to consult with an art appraiser or check recent auction results for similar prints to get an accurate estimate of its value.
U.S. half dollars dated 1965-1970 contain 40% silver and are currently worth about $3.
The U.S. 1970-D Kennedy half dollar was not released for circulation.
saw it on ebay sold for $843.
No, the value depends on the purity of silver, which coins you are talking about and the silver spot price. Currently, all US 90% silver coins (quarters, dimes and half dollars dated 1964 and before) are worth in melt value about 21 times face value. The percentage varies if you are talking about 40% silver half dollars (dated 1965-1970) and 35% silver war nickels (nickels dated 1942-1945 with a large mintmark over the Monticello). Of course, if silver were to go back up, they'd be worth more times face value. If silver drops, they'd be worth less than 21 times face value.
Before 1970, half dollars had silver in them, but in 1970, they used no silver in the coins, so it is worth only $0.50.