Black & Decker Cordless Caulking Gun - $40 (Ivanhoe)

This is a battery-operated caulk gun that works with standard tubes of caulk.
It runs on 4 AA batteries.
It is in excellent condition and has been used very little.
It has two speed selections.
It saves a lot of time and makes a better finish for someone who is not really good at applying caulk (like me).