All vapers (including those who live outside CA), especially those who buy from companies located in CA, should tell CA Assembly members that if AB 1500 passes, you'll stop buying buy e-cig products from companies located in California and buy them from companies outside of CA (and that most other customers will do so as well) due to the extra hassles and expenses.
All CA vendors (who sell online, mail order or over-the-phone) should tell CA Assembly members that AB 1500 will destroy their business or sharply reduce their sales (and that both their CA and out of state customers will switch to buying similar products from vendors located outside CA).
While AB 1500's age verification mandate prior to online purchases is likely to be enacted, it shouldn't be conceded. Rather CA Assembly members need to be told that there is NO evidence that CA youth (or any other youth) buy e-cigs from the Internet (except the one or two teens CA AG Harris hired to try buying e-cigs from online retailers in a sting several years ago).
The 2009 Tobacco Control Act did NOT impose any age verification regulations on Internet sales of tobacco products, and I've seen nothing in the FDA deeming regulation that would impose them on Internet sales of e-cigs. Rather, the 2009 PACT Act banned the vast majority of cigarette sales on the Internet (and also applied to smokeless tobacco), but the PACT Act does not apply to e-cigs (and cannot apply to e-cigs unless it is amended by Congress, which isn't going to happen). From 2006-2009, about a dozen states passed laws trying to crack down on untaxed cigarettes being sold on the Internet (because the states were losing tax revenue). But there was never any evidence that youth were buying cigarettes over the Internet.
Since Appropriations Cmte is concerned about state spending, a good argument to make is that AB 1500 would cost CA taxpayers lots of money to enforce, and there would still be lots of violations (even if CA trains and stations nicotine sniffing dogs at every Post Office, Fedex and UPS facility in the state).