I've been doing this since 2008 and the last thing I want to go back to is my variable voltage Provari. I've got 3 and they all still work. As a matter of fact, the only device that I've ever had that did require service was one of my old Provari's. Funny thing is they did fix it, but it was the best of the best back then. And that "warranty" is no guarantee. The last time I checked, Provape was based here in the US (Wisconsin if I recall correctly). Provape could just as easily go belly up and take that warranty with them.
I'll admit, when I bought my Provari's they were a hell of a lot more than $27 and I've never bothered to look at any of their products or prices in longer than I can remember. It's about time the price came down on them - however, I don't care if they cost $10. It's still foolish. You're investing thousands of dollars into supplies to vape like you did in the dark ages. If you've been driving a Rolls Royce for as long as you can remember and they suddenly are unavailable, do you take all that money and go buy a fleet of Yugos? Not all of those supplies you need to make juice won't even last forever even if you freeze them.
It's also very easy to take an old Altoids box (or something comparable) and buy individual electrical components, solder them together and build a device that will eclipse anything that a completely useless variable voltage device can deliver in terms of value. Even if you can't build one yourself, there will be plenty of people offering their services to do so. A warranty won't even matter on a throw away device. Even a mech device, which is the equivalent of a flashlight will work better than a Provari - and with no electrical parts - will last longer than all of your supplies.
Edit - And BTW - the reason the Provari failed is it's shape and internal design. It would constantly either get knocked over or roll off the table if wasn't able to place in a stand. The way the board was attached inside the metal case was a major design flaw that I don't know if they ever changed.