Scott's Specialized US Catalog lists prices for First Day Covers (FDCs) as well as plate blocks.
$1.50 (Scott Specialized Catalog of US Stamps 2011, page 405(First Day Covers))
$1.25 - This stamp Scott Catalog #1756 (1978). First Day Covers catalog for $1.25. (Scott Specialized Catalog for Stamps 2011, page 398)
Scott Number US 1801You can consult a specialized US Stamp Catalog that lists First Day Covers in it. You can purchase the FDC for $2.25 from most dealers.
Yes
First Day Covers: $1.50 (page 393)This stamp isn't worth a lot. It is Scott Catalog #1003. Issued as a commemorative issue Dec. 10, 1951. 116,130,000 million were printed (page 529). There are 5 values for this stamp and they are:New: 20 centsUsed: 20 centsFace: 3 centsDealer: 4 centsSheet: $11.50 (Brookman Catalog)(Scott Specialized Catalog of US Stamps 2001, page 101)
There wasn't any Lincoln First Day in 1952. The nearest to that was in 1954. The catalog value of a 1954 FDC is $1.50
That would be US Scott Number 2417. A First Day Cover has a catalog value of $4.
Scott Number 1359. Catalog value is $2.95.
The 2009 Scott Specialized Catalogue of United States Stamps & Covers puts a catalog value of $2.25 on the W.C. Handy stamp issued in 1969. (No one is likely to offer you as much as catalog value.) You can see one offered for sale for $2.91 at http://stampstore.org/sto_displayItem.asp?StampID=106360088
I believe you mean Scott Catalog #2446, 25 cent, Gone With the Wind, issued on March 23, 1990. This stamp came in a set of 4 stamps honoring 'Classic Films'.The 'First Day Cover' for this issue was issued at Hollywood, California on March 23. There were 863,079 'First Day Covers' issued with all four stamps or single stamp.The value for this 'First Day Cover' is:Four stamps on cover: = $5One stamp on cover: = $2.50(Scott Specialized Catalog for US Stamps, page 401)
Commercially produced First Day Covers of standard commemoratives like this are typically worth about a dollar. The Bicentennial stamps may bring a slightly higher value. Higher value stamps, or specific cachet makers are worth more. A specialized catalog will list the value of a cachet or un-cacheted cover.
Most commercially produced First Day Covers of standard commemoratives like this are typically worth a dollar or two. They can be purchased for on eBay or through dealers. Higher value stamps, or specific cachet makers are worth more. A specialized catalog will list the value of a cachet or un-cacheted cover.