What is the value of an 1809 US half dollar?

Three varieties of bust-type halves were made in 1809. Look at the coin's edge to see if there is a pattern or just standard reeding. Numismedia lists the following approximate retail values as of 03/2010:

Standard reeding:

Very worn condition - $61

Moderately worn - $108

Slightly worn - $180

Almost no wear - $850

Uncirculated - $1,980 to $23,130 depending on quality

"III" on the edge:

Very worn condition - $66

Moderately worn - $127

Slightly worn - $240

Almost no wear - $1,640

Uncirculated - $3,600 to $10,940

"XXX" on the edge:

Very worn condition - $63

Moderately worn - $138

Slightly worn - $240

Almost no wear - $1,796

Uncirculated - $5,820 to $10,630