you might want to highlight a bit more
that you are using FOTL tshirts
to ensure quality

so people know they are getting a quality tee with a custom print.

even still price and shipping is still a bit expensive
obviously you are probably printing to order via a 3rd party, which is likely why the price is as it is
you may want to see if you can get a better deal

you might want to try uploading designs to teespring, zazzle or spreadshirt
and then just post links
rather than doing yourself