Good Vanillia usually is very expensive. You can mix that 1/32 in 15 ml's of PG or VG and only have to use 1 drop in 10 to 15 ml's of mix for it to have an effect.
man am I curious about that stuff. 1 drop in 10ml would stretch it quite a bit, so that price tag would balance itself i think. i'm considering picking up a small bottle.