Nice gun but...
The S&W 4046 is a nice gun but heavy. Since it has a 4 or less inch barrel it is a 12[6] handgun. That means only other 12[6] PAL holders can buy and possess it. The more desirable gun in the same format is/was the 4006, also classed as a prohib, but it had all the best features of the 4000 series.
BarSto barrels in 29 Palms California used to make replacement restricted barrel for these prohibs but they have stopped due to the poor and small amounts of sales. It would be difficult to find a barrel for your 4046 that would probably cost more than the gun is now worth.
The federal Conservative government will end the long gun registry with Bill C-19 in the very near future. However, I am unsure if they will change the status of 12[6] prohibited handguns. It could happen. Will it? Unknown. So, very nice and desirable prohibs are generally worth C$350.00-450.00. Not so nice prohibs are worth, if you can sell them, C$50.00-100.00. A nice S&W 4046 prohib is worth C$225.00-250.00.