The value of the 1878 and 1887 dollars would depend on their condition and mintmark if any. The mintmark is located under the wreath of the eagle. Common mint mark dollars of those two dates and in average condition is worth about $17, up to $20 to $22 if having luster but not cleaned. Both dollars are 90% silver. The 1776-1976 dollar is an Eisenhower Bicentennial, and value depends on once again, the condition and type. The clad type if circulated is worth a small premium, under $1.50. If it's the 40% silver type then it's in the region of $3-$4 per piece, with luster. The 1 ounce silver is an American Silver Eagle. 2003 is a very recent issue and selling around $18 to $20 each uncirculated, and from $30 for the proof version. Proof values are higher for coins with deep mirror.