Couple tips, as I had one of these long ago. Make sure there's not a ton of rust on the rear tailgate, a PITA to fix or to replace the whole thing $$. The reason being, if it's started to rust there's a possibility that your rear window components could be damaged and break at any point. And if that goes, you won't be using it to haul any pins until it's fixed. Also make sure the key works to lower the window as well as the switch in the cab.
One bonus, you probably wouldn't ever have to worry about snow stopping you from picking up a pin.