I think the best sub-$70 card you can get is the Radeon 4670. By all accounts a very nippy performer. It beats the 9500GT in every benchmark (except Ghost Recon, in which case it's quite close) for only an extra $10.
You can pick 'em up on eBay:-
http://cgi.ebay.co.uk/SAPPHIRE-rade...hash=item220388815475&_trksid=p3286.m63.l1177
There's probably cheaper if you really look.
Check out the conclusions of guru3d review below (quite a few pages, the benchmarks start around page 8 so I just copied the conclusions).
A Guru's Verdict
So then, it's one of these products again that is really good. Sure, I'm not talking about a framerate annihilator here, but face it... 79 USD is the MSRP, these prices will be even lower in e-tail. Even with the card on a castrated 128-bit memory it still performs well, and is a bloody nice addition in the value range as everything smells right about this product.
The direct competition price wise will be the 9500 GT, which is a nice card, yet performance wise is slapped with a proverbial trout in the face by the Radeon HD 4670. The next card in line competing would then be the GeForce 9600 GSO, which quite honestly offers a lot of value versus performance as well. Yet prices on the GSO hover roughly at 90 to 100 USD (check here). And with a 30 USD margin the 9600 GSO is not really competing with the Radeon HD 4670. My bet is that you'd opt for the 9600 GT way sooner at 100-110 USD (check here). And though more expensive, that might be the best next thing, but still that's a 30-40 USD difference. You can tell from the 79 USD price point, the positioning of the Radeon HD 4670 is looking really good.
Personally what I really like about the card are the new power states. See, this card only utilizes more power when it's actually needed. While working in desktop mode I noticed my rig utilizing 115 Watts, and guys... this is a pretty high-end system. So these numbers are purely achieved by the graphics card. Very commendable.
Let's sum it up. Pop in a Blu-ray disc and the GPU can decode and enhance the movie for you, it'll even send 8 channel sound to your receiver or HD screen. Games wise you cannot ignore the fact that playing most modern games with very high image quality settings at 1280x1024 will not be a problem whatsoever. In fact, most games will play fine at very decent framerates at 1600x1200 as well.
The price is right, the performance is right, the noise levels are right, power consumption is right, features set is right. The only negative I could find is a somewhat high GPU temperature when we stress it, but even that is within defined AMD safety levels.
Other than that, if 80 USD / 60 EUR is your maximum budget... there's honest to the one almighty nothing I can say to keep you from purchasing this product. You'll absolutely respect what it does for the money. This surely is one of the best years for section, they are on a roll and you as a consumer will benefit from it greatly.
The Radeon 4670 512MB version is definitely recommend by Guru3D.com, if you are on a limited budget.