Hard to sell anything at the moment. I just looked at a HQ almost identical to your HZ but an auto, yellow, side windows and all. Minor marks, no body or minimal body rust. Good enough to register and drive. Could buy for $7k maybe less. When HQ's are around for those sort of $ you can see why it is hard to get decent $ for a HZ. If yours was a ute I'd aleady have grabbed it as a good HZ ute body is worth the asking price!