What is the Value of 410 pistol?

Which .410 pistol? There have been several. Perhaps the most current is the Taurus Judge revolver. These are currently for sale, and you should be able to get a price from most dealers.

However, there have been earlier SMOOTHBORE .410 pistols, including the H&R Handy-gun (.410 smoothbore pistol w/ 10 inch bbl) and the .44 Gamegetter. These can be worth $500-$2000 depending on condition IF they have been registered with the BATFE and are transferable- they are Class III firearms, in the "Any Other Weapon" category.