2004 is the first year the holiday sets were issued with the special quarter. It trades at a premium to subsequent years. As previously mentioned, it has a catalogue value of $40 and rarely sells for less than $20. Mintage is 62,777 sets. The '67 set is likely circulation coins and not PL but it's hard to tell from a picture. If PL it would be 1.1oz of silver but circulation dimes and quarters could be 50% silver which would drop that number down a bit.