We would like you to assess the QUALITY of each of the following argument (discussing Gun Control) and determine if the argument is Valid or Invalid. A valid argument is clearly interpretable and either expresses an argument, or a premise or a conclusion that can be used in an argument for the topic of gun control. An invalid argument is a phrase that cannot be interpreted as an argument or not on the topic of gun control.

No, the gun (+one set of ammo) still costs more than restocking pepper spray for a lifetime (calculation: pepper spray @~Σ7 per year, handgun @~Σ500 = ~71 years)
Valid

While slavery was at one time legal, it was not legal as a result of the Constitution or the Bill of Rights.
Invalid

Even if attacks still occur, having civilians with permitted concealed handguns limits the damage.

Valid