In the coin business the term "flat pack" refers to older proof sets 1964 and before that are packaged in envelopes not the hard plastic cases that are now used.
The current average value of a 1962 US proof set is $29.
The value of the set is dependent on condition. However, the proof set value is between $50 and $70 US.
The current value of a 1962 US proof set is $29.
11-8-11>> The current value of a 1978 US proof set is $9.
11-8-11>> The current value of a 1962 US proof set is $30.
As of 03/2012 a 1957 US proof set in its original pliofilm packet sells for about $35.
As of 10/2009 a 1972 proof set is worth: $8.00 - $9.00.
A 2004-S annual proof set is worth: $70-$80.
A 1973-S proof set is worth from $12 to $15.00.
There were two proof sets issued in 1987. The regular proof set is worth $11.00. The 'Prestige' proof set which included the 'Constitution Dollar' is worth $45.00.
A 1999 US Mint 50 State Quarters Proof Set is worth about five US dollars. However, a 1999-2008 US Mint 50 State Quarters Proof Set is worth about 100 US dollars.
July 9, 2009 The Uncirculated US Mint set is valued at about $15. The 2005 US Mint Proof set is valued at about $25. The 2005 US Mint Proof set is valued at about $42.