@Kuljit, SoonerChris & Train2: Thank you all very much.

I feel stupid now (well, I should say "stupider than usual") that I simply didn't scroll down far enough on their "Ordering Info" page. I did find a couple of other sites that sell ProVaris when I used better search criteria than I started with.
I really shouldn't even imply that "I'll never buy a ProVari because it lacks VW and is very expensive". Who knows what the future may hold? I feel differently about some mods, mechs and RDAs now than I did a month ago, as I've learned a lot since then. And I'm confident I'll know more next month than I know now, as well.
On my short-term horizon is a Sigelei Zmax V5. But who's to say that I won't end up deciding to get myself a ProVari for my birthday this year (October)? Goodness knows I've spent "outside the normal bounds" for gadgets in the past.
Case in point: The year
Die Another Day was released, Norelco had a sales promotion for their newest model of electric razor, which was featured in the movie (the one Bond was using in the Hong Kong hotel room around 20 minutes or so into the movie). The razor - their flagship product at the time - cost around $225, but you could pay some 40 bucks more to get a little, painted-on
Die Another Day logo on the side of the razor. Not many people paid the premium for that. But, of course, being the Bond nut that I am, I did. Still have it to this day, in fact. It's 12 years old, and its battery is as strong as the day I bought it.
Now, I'm sure that the small bit of paint on the side of my electric razor has nothing to do with its reliability. But it is a very nice and well-built razor, and there's really no way to know how long any product you buy, whether cheap or expensive, will last until you live with it for a while.
The point is, aspects of a product that may not be important to some people can be quite important to others. From everything I've read, the ProVari is a top-shelf APV. And some people will consider the ProVari to be the "king" of APVs. For others, the Zmax may be the king. Or the Vamo. Or the Nemesis. And so on...
My recommendation is, before you spend upwards of $100 on a vaping device, do at least a few days worth of research and ask questions in a place such as this until you feel comfortable that your money will be well spent. Because what you buy may very well end up being your "King APV"!