No silver coins were included in the 1973 Proof sets.
The U.S. Mint did not issue a 1979 Silver Proof set. None of the coins contain any silver.
A 1973-S proof set is worth from $12 to $15.00.
It depends on your preference. A silver proof set contains coins made of 90% silver, while a regular proof set does not. Silver proof sets tend to have a higher intrinsic value due to the silver content, but they may also come at a higher cost compared to regular proof sets.
The 40% proof silver set was a 3 piece.
The 14-piece silver proof set is currently valued at $44.00. Issue price was $56.96. A 5-piece Silver Quarter proof set is $38.00. Issue price for this set was $32.95.
With original Mint packaging retail is $30.00 for a Silver Proof Set
Numismedia lists a 1999 silver proof set with a retail price of about $315 as of 04/2009.
A 1985 proof contains no silver coins.
As of 07/2010 a 2000 silver proof set retails for about $35. Your proof set's package should say that it's a "Prestige" set. Anything else contains copper-nickel coins, not silver and sells for about $14.
No, the only Kennedy Half dollars after 1971 that are worth more than 50 cents are those found in proof or silver proof sets.
It is possible, but it depends on which set your coin was in. If your coin is in a standard proof set, it contains no silver. On the other hand, if your coin is in a 3 coin silver proof set with the dollar, half and quarter it is 40% silver. If your coin is loose, you should be able to look at the edge, if it is silver it will usually look more white compared to the non-silver version which will have a stripe of bright red (or sometimes pink) copper.
The 3 piece 40% silver clad proof set is $29.00 issue price was $15.00.