Look at the used RVs for sale online. The choices are almost endless, so research first. Decide on the size, color, layout and other features you consider important.
Drive to dealerships to buy a used RV. They have many to choose from. Dealerships also usually offer a warranty with the used RV--inquire about this feature.
Check you local newspapers for ads selling a used RV. Request information over the phone. If you like what you hear, arrange an appointment to see the RV.
Ask your friends and family to spread the word that you are looking for a used RV to buy. Let your co-workers know you are in the market for a used RV. The more people you tell, the better chance of a deal coming your way. Lay the ground work.
Stop on the road when you are out and about, if you see a sign on a used RV for sale. Jot down the phone number or contact, and then call the number. Request information on the used RV. Then arrange an appointment to see it.
Request a test drive, and make sure everything works before you make your purchase.