Just curious, what’s you definition of vaping liquid? And was your vendor reputable or someone you knew from elsewhere?
A base of vegetable glycerin and propylene glycol with additional additives for nicotine and flavour.
I bought my VG and PG from a local vendor, but those are readily available basically anywhere because they have a lot of uses outside vaping. I ordered pure liquid nicotine (in a PG suspension) online. Flavour additives also ordered online from a fairly reputable vendor that was well known in . I have no idea what policies about sharing vendors are here, but I am happy to give recommendations to anyone if they are looking to make their own juice to save money/be safer.
I mostly made fairly simple flavours, nothing too fancy. I had a friend who actually just vaped VG/PG with nicotine and no flavours at all.