I've been also waiting these stuff patiently a long time ago, and would really like to see them added onto the game, particularly weapon dealer, plainly these additions are gonna make the game more lively, and give players more pleasure away from bank robbery and other sorts of robberies.
Add private jobs
I think weapon dealer would be super cool. Being able to offer slightly lower prices than ammu would be awesome and make legal work more interesting. As legal as being an arms dealer can be lol. Good ideas. +1.
Hope this suggestion will be implemented, it will be really cool to sell weapons to players.