Tenant wants to find replacement tenant for reduced rent

[Adam Putschoegl]

My current tenant, who I knew would only be in my place for one year, and will be moving the end of June, is asking if he can get a rental reduction if he finds a replacement tenant to move in in July. Has anyone done this before and how much would be a reasonable reduction?  Seems like it might be worth something to take away the hassle of finding someone new.  Thanks!