Looking for good used single head

Hi. I have a police uniform store in Louisiana and we currently sub out all of our custom embroidery. Turn around time and cost is killing me. All of our business that goes out for embroidery gets one very sinple logo (the NOPD star and crescent, 2 colors), all other department logos are done by one of my manufacturers before the items ship, then we just send them out for names. I know I don't need something too high end. If you have something I should look it, please let me know. I may have lots of questions, so please bear with me. I am just trying to make a smart purchase as I have alot on my plate with running the uniform side of things, I would like to get a machine that almost anyone can be trained to use efficiently. Thank you.