Agree with all the above - things can be replaced, there is no price on a stress free life minus the alcoholic.
Give it a couple months. If you decide you really want it back then make arrangement but go into it with the idea that he won't give it back, and that if it becomes more trouble than its worth se la vie. Possession unfortunately is 9/10's of the law, he could use it to manipulate you and drag you down you just never know.