Well thanks for your replies.... in my country
vaping is not that popular , this is a brand new industry here... believe or not,
vaping is not that cheap here, because of the customs importing process...

... 28% taxes + shipping. a pack of analog cigarretes is about US$3.50 and a pack of 5 e-nicotine cartridge is about $15... there are no
e-liquids (yet) because you have to ask for pharmaceutical / liquids permission add $30 more...and so on....
I'm a V2 user mostly because cartridges are well packed and documented (and I really like their flavors) ; they're a lot easy to import compared with other more generic brands...and I save some money with coupons.
For us in latinamerica, analog smoking is really cheap, compared to guys from North America or Europe, it;s like the oppossite. it's crazy.