Howdy,
Yup, its me again......
Budget shopping can be trickey, here are some sugguestions for ya.
Check the classifieds, sometimes you can get a used APV for a descent price (maybe even get your hands on a darwin or similar for inexpensive)...I'd stay away from the already inexpensive ones to buy new already.
Check out the box mods, they are readily inexpensive and offer some descent quality electronics usually ( check the postings on ECF for box mods).
the VAMO and eGo APV from health Cabin are good choices...realitivly inexpensive and offer reliable electronics.
The Ego Twist and Inokin are a good choice for VV Pen style E-Cigs, the Ego Twist got me through a few days in Vegas no problems...easy to use and slender ( fits in pocket really nice).
Can't think of anything else at this point, just keep your options open, if you find an expensive PV that you may like, check out the classifieds.