Signed a Contract to sell my duplex off market buyer didn't sign

[Leon Chappell]

I signed to sell my duplex to a off market buyer back in January, they didn't sign it. They stopped responding, and the numbers I have for them are never answered. I want to sell it to another buyer now. I have even had a attorney try to get in contact with them the let them know I don't want to sell to them now. They still didn't respond to the attorney's email. Also the offer didn't have a expiration date on it that makes the offer automatically expire if not signed after a certain period. I was just wondering if I could go ahead and sell to someone else or am I still binding even though I tried everything to let them know I don't want to sell to them anymore?..... I personally feel like as soon as I sell to someone else the first people are going to magically get in contact with me like, they want to buy and try to sue me since I don't have the duplex anymore.