The only sub-$100 AGP cards I would look at for more than just occasional gaming are the 1650 Pro and 2600 Pro cards. They aren't great but still miles better than a 7600GS. Beyond that, ebay is the place to go.
I must comment, that according to the reviews I've seen the 1650 Pro is only marginally better :)
Another thing to cosider, if there's any plans on using it with Linux...
ATI cards will prematurely gray your hair.
The only sub-$100 AGP cards I would look at for more than just occasional gaming are the 1650 Pro and 2600 Pro cards. They aren't great but still miles better than a 7600GS. Beyond that, ebay is the place to go.
I must comment, that according to the reviews I've seen the 1650 Pro is only marginally better :)
Another thing to cosider, if there's any plans on using it with Linux...
ATI cards will prematurely gray your hair.
They're similar in older games, but from what I'm seeing the gap has increased by quite a bit in titles from last few months, which are all very shader heavy. I mentioned it mainly just because of its pricepoint, as you can't really get anything else in the same league for $60; the 2600 is much better if you can spend $35 more. You're right about the Linux support though.
There actually used to be very decent AGP cards available around $100 in retail channels only a few months ago (namely the X1950GT), but those seem to have all dried up unfortunately. At this point, I think ebay is a much better option than buying anything AGP at retail. I see a bunch of 7800GSs there for around $50 right now.