I have found that old car ads are some of the best ones out there. I have found, in my opinion, that the best ones are from the 1940's to the late 1950's. The ads from the 40's are particularly nice. In addition to this, I have just added a new page of cars to my main site, Retro Ads and Graphics.
This series of ads for Nash are really great. I think these are from the 1940s.
This 1952 Oldsmobile Rocket is another favorite. This ad is from a large format magazine and is in mint shape.
Here is a trio of Chevys from 1957.
Here are a few beautiful ads for 21940s Fords and a 1950s model.
Hudson was a well-known brand. I thought I had more Hudson ads. I will have to seach around for them. Here is one from 1956.
Here are a few 1950s era Pontiac ads.
I do not want to forget about Dodge. I do not have many old ones so a few from the 1960s are here, including the legendary 1969 Dodge Charger.