If you are looking for a used RV for sale, there are some things to consider. First, if the coach is too old, it may need quite a bit of work to get it in tip-top camping shape. In addition, it may not have all the features and options that modern RVs offer. You should always have a used RV inspected by a professional before you buy, because he/she can spot trouble items that you might overlook. If the seller refuses, look elsewhere for your RV.
A slightly used RV can be a much better buy than a brand new model, but again, it depends on the condition. If the previous owner used the RV for off-road travel, or ran up quite a lot of mileage on the coach, it might not be such a good buy. Try to find out how the owner used it, and how long they owned it before you make the decision to buy a used RV. RVs from private owners can be a good deal, but you have to weigh your options and how much you are willing to spend if the RV has unforeseen problems.