Don't buy any Eq from players, as long you don't have enough money to equip your whole character :p without to get poor^^!!!
You can get D- and C-Grade rly cheap in (for example) Giran (Common-Items).
I've bought an Elven Long Sword for 70k and a Brigadine-Set for ~20-30k!!!
Well these common-items have 2-3 disadvantages, for expample they have no effects. But its a nice idea for newbies on retail