Was probate ever opened and completed? If not, the “heirs” have nothing to sell. Even if they did probate, You’re heading for some legal problems, talk to a local attorney.
Best case, you’ll own an “undivided” 1/2 interest in the property. Without probate having been done, you own nothing. The other two heirs still have a legal interest in the property.
Talk to a local attorney or title co. to understand what you need/have.