We had no luck trying to sell our 2500 HD and Triple E fiver as a unit not one person showed interest. Finally got lucky with a response on the truck (I had it in local papers and local radio station) and got a good price for it.
The trailer finally sold for about what the NADA had it listed in their "high" column.
I did spend a week on it stem to stern...shampooed carpets twice full wax job etc. it looked fantastic.
One thing that we are lucky to have here is a local RV service place who let you park it on consignment and they keep the keys and show when needed and they do it for a very reasonable price. Lots more interest there and you don't have to put up with the "lookie lous" :)
Sorry about your problems hope you can get back into it in future.
Good luck!