Reality questions

My husband and I bought a “fixer upper” well our family has grown more quickly than we anticipated and now we need to move and we don’t have time to fix it up. Well now we are stuck with a house that we don’t think will re-sell. Has anyone done the “we buy ugly houses” thing? We are considering it but there has to be a catch. Like I understand that they might not pay what you want but will they at least pay off the mortgage? If you’ve done it I’d love to hear the whole thing perks and down sides!