I decided to create a shirt with a url matching my keyword and I'm going to see how long it takes to show up in google and if I can increase its ranking by building backlinks and social signals. Shirt keywords are very competitive but the teespring subdomain comes with an automatic 71 DA. Its usually only beat by other similar sites such as redbubble, cafepress, and sometimes pinterest (which carries a dominating 100 DA). I figured if I do my seo properly, this method can put my teespring sales on autopilot.
The only trouble I am running into at the moment is having my shirt appear in google search. I can't study this method until my shirt appears, if it ever does. So far it has been a few days and still no ranking. I'm going to build a few backlinks and see if that forces google to pick it up.
If someone has a shirt that is currently ranked in google and would like to add to this study, please fill free to.