Sometimes when I visit a place I wonder why they do not sell postcards of some interesting details. Instead they sell postcards I would never buy. Well, but this is just my opinion.
Also this happens with old postcards. Bad Postcards is an archive of vintage American postcards from 1950 to 1975. Maybe some of them are quirky, but there is no doubt that some of them are great.
If you like this site, you would probably also enjoy Postcard Gems: "The Best of Classic American Postcards of the 1959s to 1970s".
And here another collection of funny postcards (well, it depends on what you consider funny, of course!).