The vtr is a great device, VW/VV, goes up to 15 watts! It's a really well put together device, I do not personally own one yet but my bestfriend does and he loves it and I have used it and I have to say, it's a great device. Feels insanely solid, it's got some weight and it is just really a nice looking device.
Innokin VTR - 101 Vape
70 bucks, that's the cheapest I have seen anywhere. It usually goes for 100-120$!
Check out the MVP2 - I have one and I love it. Supports ohms down to 1.1 using pulsewidth modulation, goes up to 11 watts/6 volts. 2600 mah so the battery lasts forever, and it's also another very solid device from innokin.