You can do an "on demand" submission at any time, typically though, it is not cost effective. 99% of our work is done via screen printers, which is a time consuming process, some will bid a small number like that, some won't. Everything is guaranteed, if you are not happy with the print quality, we refund 100% of the purchase. Quality tees are a catch-22, in that on demand (1 or 2 at a time) is not cost effective, but how do you know the design will sell, etc, so there is risk involved. If you have an specific questions about selling your own designs (I assume that's why you were asking), let me know. Eventually I would like to have printers save screens, or keep a rotation that I can send out to allow small ecommerce sites to do 1-2 at a time, as orders come in, but Im not there just yet.