those are no longer in production and cost over double his budget. besides in general the 8800GTS costs less and generally performs a bit better.
If you won't be playing the new DX10 games, get this card: http://www.newegg.com/Product/Product.aspx...N82E16814102061 Faster and cheaper then 86GTS/79GS. I have one to, great card. If you probably will: http://www.newegg.com/Product/Product.aspx...N82E16814150229 Make sure the card is compatible with your mother board .ie if PSU can handle the card, pci-e/agp etc.