Design by Humans have preempted the Threadless sale that will start on Monday by putting all their tees on sale for just $15 until May 22nd. I have a feeling that Threadless will price their tees a little lower but comparing Threadless to DBH is like comparing apples to oranges. The tees are just that different. If you find something you like on Design by Humans I advice you to stick it in your cart and checkout as soon as possible as it has been my experience that certain sizes sell out pretty quickly.
Link: Design by Humans