I'm in the same situation as @ataylor, thinking about listing our teardrop trailer. I've done what you suggest @Kameron and checked out the other listings in the area to get a sense of prices and the different vehicles which is super helpful. How can I get a sense of how often, at least approximately, these trailers are being rented? This is really help our decision.
Before starting, I searched OD and messaged each owner with a message like, "Hi, you have a great rig! I'm actually not interested in renting your RV, I'm thinking about getting into the market myself. Would you be willing to share a little of your experience with me? I won't take more than 5 minutes of your time." Amazingly, I had probably 50% or more of the people I messaged respond, and several people gave me a good deal of their time and shared numbers and insight with me. Absolutely made a BIG difference in getting a strong start!