Not a CL ad, but had to share this one. I only know of one other similarly designed Flxible Buick that survived. And if you're wondering about the currency exchange, USD and AUD are about the same.
http://www.trademe.co.nz/motors/used-cars/other/auction-502972767.htm
http://www.trademe.co.nz/motors/used-cars/other/auction-502972767.htm