We bought our hybrid listed below about 13 years ago. We camp alot. Nearly year round. Our HTT is still in really great shape as we have always taken care. We set up tent tned so dry out if any dampness is felt. I have seen newer units in terrible shape because they were not taken care of. I always suggest a buyer take a perspective RV to a neutral qualified service center for evaluation. A honest seller will welcome this. It is money well spent. There can be problems the seller may honestly not know about as well.