The prices on the big auction board are all over the place. There are 9 being offered now, which will drive the price down unless NITB or collector quality.
It appears that those being priced for a quick sale and in a similar condition as your pistol are sold for $325 +/- $25.
You might try offering it here before putting it on the big board. I'd wait until the number of 4046 models being offered drops before listing it on the big board.