in 2013 I think I first bought a Blue. Fairly useless but I could see the possibilities (the ex wanted me to quit smoking) so I ventured into a vape shop and they set me up with a VV pen mod (with uUSB charge port on the side) still have with itsybitsy tiny tank and even smaller coils. (still have that as well) While the vape was dismal to todays standards it was enough to get me to stop smoking.
I ventured into Evods (still have some) and later upgraded to VV replaceable battery (18350) tube mods with Nautilus tanks (I actually still do have a Nautilus still in service). Then came Atlantis tanks and mixing my own unflavored juice. That was all in my first 6mo of vaping.
Then came my first TC mod, the Kanger subtank Mini, countless different RTA's and mods that I can't keep track of or recall.
I still have that VV pen mod sitting on my desk with a tank on it. I should charge it up and fill it with some salts and see how far I've come.
EDIT: I just added batteries to both these mods and they did surprisingly well!
(10W on the left and 12W on the right. Both with 18350's)
g.