They're not very common - Gunbroker, GunsAmerica and Bud's don't show any, for example - so how bad do you want it? Do you think you can find another one for what you're going to offer?
FWIW, I paid about $500 for two new 432s a couple of years ago. The first one, from Bud's, had to go back to S&W for repairs, was declared "nonrepairable" when they got it, and they had no 32 caliber anythings to offer as a replacement. So I had to find another one on Gunbroker. I think 431s went for about the same price.