I read in future possible additions that mobile armsdealer job will be added. I think you can also add a "mobile sales van" or something like this. which works like a player with certain level gets a specific vehicle (like a van or sth) which is specified for this job, he goes to shops and buys stuff like, coffee, fishing bait, armour(bullet proof vest) and etcetera, and puts them in the vehicle(like the securier mission), then drives around and sells them to people being in the vehicle. Just like the icecream van. Players can also buy lotto tickets from his van.
It can be a useful job that makes money and helps people by not needing to drive so much to buy a ticket or armour, people are impatient these days. btw to avoid unjustice, the price of armour can be a little higher or something.