sorry about the late reply Fab, been busy yeh mines still going as if it was new, Source is probly right though, but when you buy cheap you get a cheap build i guess, internally they are very simple, some are different inside but basicly the less moving parts the better all mine does it boil the fluid, once gas chamber is full with smoke a light turns on to tell you its ready, press the button and a medium sized fan (similar to computer cooling fans) just pushes the air out... but anyway if you decide to get one from ebay this is the 1 i bought http://cgi.ebay.com.au/ws/eBayISAPI.dll ... 0277339576 The brand is Rave and are actually sold in stores like Jaycar http://www.jaycar.com.au/productView.asp?ID=AF1214 so im guessing its of some Decent Quality to be passable in a Retail store.....