Not sure if I am supposed to be advertising prices outside of my forum so apologies modmins if this isn't strictly allowed, however I am being asked
My cheap rate postage is £2.65 (all First Class Recorded) and that would fit a decent amount of these in a box - you can add juices to that, as long as it doesn't go over a certain weight and height dimension it goes the cheapest price possible.
We are fortunate enough to have a good relationship with the gent who owns the Patents for all the CE's, eGo and so on, and we sell a lot of CE4's without any problem at all. As @bunglehaze plumeBlu says it depends on whether the manufacturer has skimped on materials and production standards, they do this to cut a penny in half! We have found with the Evod (Bottom Coil Clearomizer - you fill from the bottom) as they have double coils, they use up a lot of juice. We are replacing these on our site for the T3S Clearomizer, we know that they have an excellent reputation, but again as @bunglehaze plumeBlu says, the Marketplace on POTV is a brilliant place to find some excellent deals and great special offers/bargains x Linda (glad to hear though that you are a newbie, that means an extra non-smoker in the UK and an added vaper, well done you) x