This really depends on how widely collected the artist is more than the medium
However, etchings are typically made in smaller volume if both are from the same artist the etchings are usually of a higher value. Unless there was mass production involved and than it will depend on what generation it was made from and the volume of each
10
The exact value of a Robert Motherwell lithograph is actually dependent upon a number of factors. Some of these factors would include the age and condition of the lithograph.
$1500
wishing well lane lithograph authenticated by the franklin mint
The exact value of a Charles Sheeler original signed lithograph is actually dependent upon a number of factors. Some of these factors would be the age and condition of the lithograph.
bmw
US $5.00
5000.00
$500.00
The value of a hand signed and numbered etching titled First Thaw by Paul Bisson depends highly on a couple of things. Some of these things would include authenticity and condition of the etching.
100$
If the etching is one of a kind, I recomend looking for the name of the artist on the etching. If there is a name, you can look up the artist and get a general idea of what a piece of his/her art is worth. If there are more than one sculpture/etching of this same theme. Try to find the price or value of the other.