Merchant, get Discount and Overprice lvl 10. And you can vend your stuff.
Then Blacksmith, mobbing + Greed = good money. Required some basic gears such as Doppelganger and Baphomet weapon.
P.S. : If you are a starter and do not have the money for MvP stuff yet, make a Thief class to hunt Cakes and vend them with a Merchant, sell the useless loots to NPC. Save for Blacksmith nifing gears, at least thats what I did when I started.

No matter what class you go, just remember to have a Merchant class, it is the basic class to start making money.