The little area in which I retired, has a collector car auction each spring.
The web site has photo's and such on it, think there is some Poncho's in the sale this year.
Sale is April 2nd, and compared to others, it is not a Barrett-Jackson or Mecum's, some good stuff, some not so good, but over all prices for drivers are within reason.
I am Ferd guy personally, but do have an appreciation for the GM goodies.
Grumpy