Poor customer service & Bait & switch tactics

Went to puchase a used camper from Lee's, now Camping World. Overheard Paul denigrating a customer behind their back, which should have given me an inkling of what was to come. I was focused on purchasing one of three campers that had been advertised online as having reduced prices, that were even lower than what they had online. First, they saleslady showed me three other campers that were better than those online and told me they were in my price range. When I made an offer on one, I was told that the price was more than double what I had been led to believe. Tried to make an offer on the other two, same issue. I went back out and found the three that I had looked at online, picked one to make an offer on and did so. I had to leave and wait until the next day to find out if it was actually going to sell. I had to call them to see if the price was good, then wait for a call back again. Whan I received the call back, I was told that the online price wasn't negotiable after all and asked if I would like it for that price! By then they could've given me the camper and I'd have told them to shove it!! VERY repugnant, dishonest business tactics. I will NEVER darken their doorstep again.