About T-Shirt Design
I'm Not Sure If Everything Is Expensive T-Shirt works because it sounds more like something a real person would say than a random slogan. Fans of everyday humor will probably get the joke first, but it is simple enough for almost anyone to understand.
You could wear it for birthdays, bring it out for holidays, or just keep it in the normal shirt rotation. Fans of sarcasm shirts will probably like that the joke is direct and not too polished.
This funny t shirt is simple, easy to read, and does not need a huge setup for the joke to work. It is an easy design to wear when you want something a little more fun than a plain shirt.