The price changes due to what it costs us to make and the amount we must pay our artists. We attempt to keep prices as low as possible while still getting artists and creators paid. The money you put in helps support the creator that is selling the shirt and most of the time pays the artist as well. (unless the artist wanted to do it for free)
Our quality is also higher than some other third-party merch stores and because of that we must make sure to price accordingly. We attempt to keep it competitive prices while still being able to support our creators.