what's your location kevin? i guess it would depend on the cost of shipping from socal to you to see if it's worth it. otherwise you might as well buy straight from the website i use
the cartridges costs $2.00 each, shipping is about $5.00 for the lowest delivery service. that's from the website
to buy from my coworker, it's $1.60 each with no shippping cost. i suppose if you bought a lot it would save you a little bit of money
but i'm not sure if he will have the batteries for sale, and if he did have that access, not sure if the 20% applies. I'll check with him. the batteries is the white part of the ecig which you recharge, the cartridge is the disposable butt part
i got the portable battery and the power cig which has a usb cord attached to it which you can plug to your computer/laptop or to a wall adaptor or to a car adaptor. it's awesome, i highly recommend it