Yes you can get a dx10 card very cheap these days, unfortunately the performance with these cards isn’t that good with anything below a geforce 8800 and radeon 2900 . The geforce 8600 gts would be interesting to me if i was in the market for a cheaper dx 10 card but i am more than happy with my OCed 8800 gts 320mb. The prices for dx9 higher end cards like the Geforce 7950 and Radeon x1950 series are also very good ATM so it might be wise for anyone in the market for a new card to check out those aswell. A Radeon x1950pro for example can easily beat a Geforce 8600 gts in terms of performance and it costs about the same or sligthly less than the geforce. And you can still get it on AGP(and the xt version aswell).

Comparison x1950pro vs. 8600gts