I get all my syringes on Amazon. Very inexpensive in 10 packs. I use three sizes. I recommend not buying these from vape shops as the markup I've seen has been unreal, often 400 - 500%. Wizard Labs is not bad. I get nicotine from them, when in stock, as well. Haven't found anywhere lower than Amazon. About $.50 each or less in bulk. If you mix a lot, I find that the syringes last a long time, much longer than the printing and graduated marks on the outside of the syringe. Luer locks can be purchased with the syringes or separately. Good luck!