Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Mostly common sense. Constantly plugging his other books

I was disappointed that this book did not really give any new information. Most of what was written was common sense. Anyone who has ever had sales training already knows most of the techniques that dealers use. The author offers no checklist of items to inspect on the actual RV. He simply assumes that you already have all this information. Also, he spends a lot of time plugging his other book and organizatiom. The book itself is thin with many blank pages and big pictures. I think it is a bad buy.