I was chatting with the owner of N8427J, a 150G with the O-320, and he said his wings held 42 gallons of gas. I thought the long range tanks held 35. He said his airplane had "172 wings." What's up with that? He's asking 45K and it seems well equipped with avionics albeit not the latest. Here's his Craigslist add:
http://sanantonio.craigslist.org/rvs/1437459127.html