What is the value of a 1846 gold 5 dollar coin?

This coin was struck at 4 different mints. As of 10/2008 retail values are:

"Plain" (i.e. no mint mark) - $240 if very worn, $310 with moderate wear, $475 with almost no wear.

D mint mark - $300 / $970 / $3100

C mint mark - $500 / $1,380 / $7800

O mint mark - $250 / $400 / $4300