Why some Christmas ornaments become collectibles while others have almost no value after M&S or TKmaxx sold them to you? Of course, the first reason would be the age of the decoration. As for today Christmas ornament is considered a rarity if it was made before 1966; the value of the decorations produced after this year - is in personal memories. Nevertheless, I come across many collectors who would value 1970's ornaments as much as the ones made in 1940's. So there must be something else apart from the antique status.