What is the value of an 1811 US half dollar?

There were 2 varieties of halves minted in 1811. Check the date carefully to see if there's a shadow "10" under the "11".

Numismedia lists the following approximate retail values as of 02/2010:

Normal date:

Very worn condition - $61

Moderately worn - $90

Slightly worn - $144

Almost no wear - $679

Uncirculated - $1,710 to $87,750 depending on quality

11/10 date:

Very worn condition - $75

Moderately worn - $107

Slightly worn - $270

Almost no wear - $1,380

Uncirculated - $2,700 to $23,130