Such as you need to buy some 2moon dil which you know are cheap and buy some fully slotted weapons or armor for high level if you are poor in games to buy better items for your character, then you can level up quickly.
You can start buy +4 or +5 items which under 10 mil if you have more dils in your stock. Surely it depends the level of the equipment. Sometimes you can buy nly lvl80+ armor or weaps are worth the while but for lower levels (2moons gold) it works as well but there is not so much gain in dill. Then you can sell them a bit higher.
Some ppl do a lot of crespo C full runs.You can find a friend and take turns helping each other to do full runs if you cant do it solo and they get a good amount of argates, save them and buy legendary armor, argate it and sell it for at least twice the buying price. So you will have more dil to update your items in 2Moons.