Things to watch for on the deluxe is to get all parts, fan motor condition, heater core ...in question, leaks or plugged, fan resistor is it there does it work, and the control levers in the back of the control panel, if they are broken you can buy new but that just adds to the cost, bent and broken cables......doghouse on the firewall rusted out....? just a few things we have seen. Just so you know we have found out that the same fan motor was usd until about `78, you can get them thru auto zone and orielys for about $25.00