You can certainly sell a mobile in rough condition. Depending on if the home personal property or real property will factor in to the value and what type of licensee can assist you in selling it.
Selling a mobile home can be done without a realtor. You may want to try local advertising on your own. Mobile Homes are transferred in the same manner you would as a car. Mobile Homes do not hold their value. If the home is not livable, you may want to sell to a scrapper? Check mobile home park requirements and if any restrictions
Firstly, I am very sorry for your loss. Secondly, do you have an agent in the area that specializes in Mobile homes? I am not in CO, but here in FL Mobile Homes normally sell very fast and usually for cash. Good Luck with your sale, and if you need an agent that works with Mobile Homes, please reach out to me and I will be happy to help you find one. Mobile Homes normally have some special items to consider, that is why I suggest you work with someone that knows about them.