I sold my 2006 on CL last June. My advice is to first do some research to know your competition. Go on the NADA website and know the value of your TT. Go on the RV trader website to find similar TTs and their asking prices. Search CL in your area for the same or similar model TTs to see what their ads say and how much they are asking. Then find a way to differentiate your TT from others, price, cleanliness, options, etc. Your ad should tell everything a buyer would want to know about your TT before they call you. This includes the price as well as any defects. Be positive but honest in your description. Do NOT use abbreviations in your ad. CL allows for a generous word description so take advantage. Take several good pictures and offer to send more upon request in the ad. Your TT should be clean inside and out and everything in good working order. If this advice is followed, you should get good value and sell it quickly. If you overprice, have a messy TT, or one with problems, it will not sell. Do not engage with any potential buyer who brings any problems to the table and you will avoid 99% of the scammers. I only dealt with people who could physically come and look at the TT.
I got top dollar (above NADA) on both TTs I have sold following these instructions and I sold them to the first person to come out and look at them. Selling with a title encumbered by an RV loan should be no problem as long as you are not upside down. Just offer to any potential buyer to meet them at the loanholder's location (bank?) and pay off the loan with the proceeds in their presence. Good luck and as with anything, good results come from proper planning.