Cheapest way would be to buy a variable temperature heat gun or steal one and then order the volcano vaporizer easy valve kit, then buy large turkey freezer bags and make your own volcano bag with the easy valve attached. Then just blast the weed with the heat gun to fill the bag up and use it just like a volcano bag lol. My friends shop workers do that and it works very well
I'm using the arizer solo which was $140 when I ordered it. I haven't researched vapes in awhile but if I could go back I'd probably just get a pax vaporizer so I can travel with it in my pocket without worrying about the glass stem like with the solo.
You kinda have to decide what you're looking for when you compare vapes. For instance convection vs conduction, stealth vs bags and a tabletop, battery life if portable vs overall taste and efficiency. Theres cheap ones like the magic flight light box but they require finesse. There's also new ones I habent checked out
reddit.com/r/vaporents
Pretty great info there also the fuck combustion forums