1900s - Buy this. It is good and will last.
1920s - Buy this. It is chic.
1940s - Buy this or we'll all die.
1950s - Buy this, your husband will love you.
1980s - Buy this! And this! And this! Woo!
1990s - What do you mean, you don't want to buy this? We rather think you do. Imagine the implications if you don't.
2000s - What is it we're selling again? Oh.
Link: The Friday Thing