Dual Screen setup

Looking at getting set up with second monitor. Need a second video card to do so. Are there any things i need to watch for? i was looking at inexpensive, but want to make sure there aren't any major things to watch for or specs i should go by. thanks everyone TDub

i just have whatever came with my computer. There is only one port for monitor. HP Pavillion

I run dual screens. I have the xfx brand geforce 6200a 128 mb agp video card. runs about $70.00 very easy installation and setup..

thanks everyone! Sounds like doesn't have to be anything overly expensive to get the result i'm looking for! Appreciate all of the feedback, TDub