Sell might be an option. One of those things where there was an offer a while back, perhaps they will take it for a song. But otherwise, how to go about it?

It's hard to say without knowing more about the business, but assuming you know who your most likely acquirers are get a contact within those businesses and approach them directly.

Who do you primarily owe money to ? - if a significant chunk is to a supplier then you might want to see if you can negotiate a deal with the supplier writing off the debt in exchange for equity in the company.

Banks!