I agree with that Mike. Before you came out with variable voltage I made and used 5 volt fixed PVs and since then they are in my junk box or have been given away. I wouldn't have or wish a fixed voltage mod on anyone. Variable Voltage is the only way to go. If you buy other fixed first it will end up being wasted money once you find a Buzz or Infinity. If I had someone starting out in vaping I'd get them an Infinity and start them out right. The rest of them are just glorified 7/11 store disposable ecigs.
What most people do not understand is that as a MFG you have to have a good markup on what you MFG , the overhead costs are huge even in China ( much less but still a lot ) , I have to have multiple times in order to even THINK about MFG a product ( a fact of business ! )
China makes these things at very low costs and make large amounts of them , this is why an Ego can be the price it is , in the USA we have the importing costs and assembly costs so the costs go WAY UP FAST .