Who sells the lavatube for the cheapest in the smaller version?

[son et lumiere]

Sorry if I sound stupid. I havent done any research into this lavatube except I know it's a VV and it works pretty easy. I guess there are two versions. I want the smaller version. Who has it for the cheapest?

 

[Angi2299]

Apollo VTube Kit This is the cheapest I have found so far. They have both sizes and multiple colors.

Liberty Flights Electronic Cigarette - Starter Kits - LT VV has the large one in black only - price is lower than Appollo's, but I don't see the smaller one.