I am sorry for your loss. I'm sure you are dealing with a lot, and selling an RV can be a time consuming and stressful process. While I've sold a couple of motorhomes on my own with success, it wasn't during a period such as you are navigating through right now. Therefore, I agree with the above posters that consignment may be a good option for you. I did a Google search and found a motorhome dealer in Holland that does consignment sales. It's Holland Motorhomes, and their number is (800) 221-7197. There are likely others. I know nothing of your motorhome and whether it's one that fits the parameters of what that dealer would be interested in (they look to sell mainly late model coaches). If your coach is a bit older, there are certainly dealers that may be interested, you'd just have to call others and ask the questions.
I hope you have luck selling.