As a Rogue, with a good weapon, it can add a lot of efficiency during the upgrade process. After some data collection and sorting, wowclassicgp lists some cheapest wow classic gold upgrade guides and easy-to-access weapons for your reference.
The best weapons of level 1-20 should be Cruel Barb and Thief's Blade. If you can get these two weapons at around level 20, there will be no enemies and monsters blocking you if the levels are not much different. You will be very successful on the road t