An easy way to make credits is to go on "Vendor search" which usually has the cheapest items. For example you can get an R.I.S armor set for 6mil, which would sell on the regular bazaar at 12mil or higher which is really good. You can buy things off of vendor search and sell them on the bazaar for more than the price you bought it for. There is also "investing", or you can get rare items off the vendor search (such as when I got the last Pre-NGE E11 MK II carbine on Starsider) - I could sell that for 100mil or any price i want considering no one else is selling it. If you are patient you usually have 10-50mil by the end of the week. I make money easily with this trick.