What is the value of an 1843 US quarter?

Answer 1

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 - $23

Moderately worn - $32

Slightly worn - $43

Almost no wear - $220

Uncirculated - $408 to $6,030 depending on quality

"O" mint mark (New Orleans):

Very worn condition - $29

Moderately worn - $52

Slightly worn - $132

Almost no wear - $1,180

Uncirculated - $2,410 to $8,550