Best Video Card for under $50 all i can find is ones around $70 i was lookin at an ATI 1800XT 512MB PCI! HELP!

i need to find a good video card thats pci not pci-e when ever i search for one on say.. ebay or somtin it always says pci-e even though i type pci cuz my friend has a dell (cheap piece of crap never go dell unless its an older one) and i has a place in it where it looks like someone could soder in an agp port but i aint doin that it has 2.4ghz and 256mb ram we want to play games on it but its got a junk Intel Extreme Intergrated Graphics card in it it supports HW TnL but limited like not shader or vertex shader support its no better than an ATI RAGE PRO :/ i was think in the video card i saw in walmart it was an ATI 1800XT 512MB PCI i even look at the see threw hole in the box and it was a pci port card and was like low profile and had a small fan but ive be hearin about the card it sound pretty good and has shaders 3.0 (good enough for most our games) but it was $70 any one know where i could find it for a lil under $50 plus shipping? all i need the the url to the site so plz help!!!