It looks like the US Mint is adjusting prices significantly in 2007 to account for the inclusion of the new Presidential $1 Dollar Coins in the annual sets, and the increased cost of many of the base and precious metals.

Quoted from their new answers site:

You may notice price changes on some of our recurring products this year. These changes, both increases and decreases, can be attributed to several factors:

• Many of our annual sets have grown to include Presidential $1 Coins.
• The cost of the base metals that make up many of our coins has increased significantly over the past several years.

Opportunities have been identified to increase customer value by reducing product prices where possible.

Below is a list of current product prices, followed by the change from last year’s price.

• United States Mint Proof Set – $26.95 (+$4.00)
• United States Mint Silver Proof Set – $44.95 (+$7.00)
• United States Mint 50 State Quarters Proof Set – $13.95 (-$2.00)
• United States Mint 50 State Quarters Silver Proof Set – $25.95 (+$2.00)
• United States Mint Uncirculated Set – $22.95 (+$6.00)
• Golden Dollar 250-Coin Bag – $319.95 (-$27.05)
• Golden Dollar 25-Coin Roll – $35.95 (+$0.45)
• 50 State Quarters 1,000-Coin Bag – $309.95 (+$9.95)
• 50 State Quarters 100-Coin Bag – $32.95 (-$2.55)
• 50 State Quarters Two-Roll Set – $32.95 (+$0.95)
• Kennedy Half-Dollar 200-Coin Bag – $130.95 (-$4.05)
• Kennedy Half-Dollar Two-Roll Set – $32.95 (-$2.55)
• 50 State Quarters First Day Coin Covers – $14.95 (-$5.00)
• Collecting America’s Coins: Beginner Basics – $11.95 (-$2.55)

The price changes are most noticeable around the precious metal coins, particularly the silver proof sets.  It will be interesting to see how prices adjust on the open market.  I noticed last week that the price of silver proof sets on eBay hadn’t yet adjusted to these new prices.

More information can be found on the US Mint website.