Have a 183 DB with the screw on choke (paid $100) and an 183 KA with the Polychoke (paid $129) both intended for this year's grouse season.
Nice little rifles, havn't shot the KA yet, the DB is fun, easy to handle, reasonably accurate. A bit tricky to load the internal magazine and sometimes it misfeeds but I think that's more me than the gun.
For a wee bit more you could buy a new single shot 410 but these old Mossy's are kinda neat and the 3 shot capability is a bonus.
Buy it.