I hate to tell you, but very little. You can purchase them from a dealer or on eBay for about $2 per cover or even less. They have almost no real gold, such a thin layer that it would take thousands of them to get a measurable amount.
Scott US#1270If it is a first day of issue, it should have a cancellation. A First Day Cover is likely to be worth about a dollar. Without the cancellation it is worth the same as a used stamp, about 15 cents.
25 cents max.
25 cents.
In perfect condition it is worth 25 cents.
The stamp alone is around $1. You could get around $2 for the first day cover, it has a nice cachet and is pristine.
Unmarked means it is not on cover and not cancelled. Which means it can't be a First Day of Issue. A First Day of Issue cover could cost 2 or 3 dollars. The individual stamp can be purchased for less than a dollar.
Everyone hopes to come across the "Old Stamp Collection" that had been sitting in the closet for years. Bring the collection to a local dealer for evaluation. It will be a modest fee but it could be worth the charge.
A First Day Cover on the official Teddy Roosevelt envelope is worth about $7 or $8 depending on condition. If it's just a stamp on a plain cover, then it's worth about .50c. The stamp is worth .20 used of envelope.
well to a collecter on a good day $2000
forty dollars
That would be US Scott Number 2417. A First Day Cover has a catalog value of $4.
First Day Covers typically run $1 to $2 each depending on condition and who made them.