June 28 2011>>
It is worth $30.
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The price varies according to the market.
As of 2012-07-25, PCGS lists it as:
1957 Proof Set: $32
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The value of a 1957 proof set can vary depending on its condition, rarity, and demand. On average, a 1957 proof set is worth around $45 to $70. However, if the set is in exceptional condition or contains specific rare coins, it could be worth more.
June 27 2011>> It is worth $30.
Average retail value is $29.00 the issue price was $2.10
A 2008-S annual proof set is worth: $25 -$35.00.
June 27 2011>> It is worth $350.
June 28 2011>> It is worth $70.