Tenant wants to break lease and I want to sell

[Jake Babu]

I let my tenant know that I would not be renewing our 1 year lease in March of 2019 because I wanted to sell the apartment. He asked if he could break the lease as he wanted to by another property (which he hasn't identified). I could see this working for both of us or having a empty apartment. I was thinking I could ask for 1 more month or rent after he moves out, hopefully giving me 3-4 months to sell the apartment. What is a fair response to this?