What is the value of an 1850 US quarter?

Answer 1

1850 is not a particularly rare year for Liberty Seated quarters. Look on the back of the coin to see if there's a small mint mark letter. It may be blank or there may be an O.

Numismedia lists the following approximate retail values as of 03/2010:

No mint mark (Philadelphia):

Very worn condition - $31

Moderately worn - $69

Slightly worn - $108

Almost no wear - $502

Uncirculated - $1,020 to $14,380 depending on quality

"O" mint mark (New Orleans):

Very worn condition - $26

Moderately worn - $51

Slightly worn - $144

Almost no wear - $748

Uncirculated - $1,440 to $15,630