There's a couple of options in your price range, the
madvapes vv boxmod for around $35, and the Lava Tube @ about $55. I've got a
madvapes VV and have had it for over a year now but I've had to replace the switch a couple of times. The Lava Tube or same under a few names, is now available in a V3 with a 4 amp limit. Not a bad deal. Whatever you decide, before you
buy read about the different products in a few threads here on ECF to get the input of those who own the units.