To find the fair market value of an RV, you can consider the following methods:

1. Online Research: Utilize RV listing websites, such as RVTrader, RVUSA, or RVshare, to browse similar models and their asking prices. This will give you an idea of the average market value of the RV you are interested in.

2. NADA Guides: Visit the National Automobile Dealers Association (NADA) website, which offers a database of RV values. Enter specific details about the RV, such as make, model, year, mileage, and optional features, to receive an estimated value range.

3. Kelley Blue Book for RVs: The Kelley Blue Book also provides valuations for various types of RVs. Visit their website, input the necessary information about the RV, and receive an estimated value range.

4. Hire an Appraiser: If you want an accurate and professional valuation, you can hire an independent appraiser who specializes in RVs. They will assess specific factors like condition, mileage, upgrades, and market trends to provide a fair market value.

5. Consult Dealerships: Reach out to local RV dealerships and ask for estimates or trade-in values for similar models. Though they may have a bias towards selling their own inventory, their insights can give you a general idea of market trends.

Remember, the fair market value is influenced by various factors such as age, condition, mileage, optional features, and regional demand. It’s advisable to consider multiple sources to get a more reliable estimate.