Walmart. They ask for id just to log and they ask whats the use... I always say trt they never ask anymore questions. They are like 10 or 20 cents a piece for 25g 3ml. Ive also used myers tractor supply. There is always a walmart near by though.I'm sure there's a thread somewhere, but can't seem to find. Where do you go to buy your syringes and pins? looking to buy bulk. Thanks for any suggestions!