description you can use for your eBay listing:

This is an OEM Buick Climate Control Unit that is fully functional, originally designed for a 1986-1990 Buick Park Avenue Lesabre . The unit comes with Electronic Touch control and rear defrost, so you can control the temperature to your liking while keeping your rear window fog-free. The exterior of the unit is made of durable plastic, ensuring that your unit will not be easily damaged.