Antiques or vintage
Buyers understand that an antique item is something quite specific, and not just anything old. A seller who calls something made in the 1950s an antique is just wrong.
A true antique item is an object that is 100 years of age or older. This definition keeps things pretty simple to understand most of the time. The scale slides each year, of course, as more and more things fall into the antique range.
For many decades, the term collectible represented anything that was not old enough to fall under the antique umbrella. The use of the word vintage used to be largely associated with specific collecting genres—such as clothing, costume jewelry or postcards. These days the term vintage covers items that dates from the 1940s until the 1980s.