[link|http://www.caldreamcars.net/416418.html|1970 Riviera] - it's only $12k. :-)
I think the Riviera reached its zenith with the 1971-1973 [link|http://www.cardomain.com/member_pages/show_image.pl?fg=000000&bg=FFFFFF&migration=1&image=http://memimage.cardomain.com/member_images/7/web/403000-403999/403139_7_full.jpg|"boat-tailed"] models. Supposedly the rear window cost $1200 to manufacture. With its low compression 455 CID motor, one would be lucky to get 8 mpg out of that yacht.
Cheers,
Scott.