Hello all, I am a first time popup camper owner. I want to install an A/C on the roof. I already have a vent there. I have searched amazon and google trying to find an A/C to no avail. I checked with the authorized dealer for my brand (Jayco) in the area and they wanted $1,000 to purchase and install the A/C. I can do it myself if I can just find an A/C. Any advice on where to go to buy one? Any brands you recommend? Does anyone know where to buy second hand A/Cs? Like a junk yard, etc...? Thanks for any insight you may provide.