What's the market value of this motherboard?..

Well this is a very old motherboard. I guess it will be around 4 years old. I guess you will be lucky if you are able to sell it. Also you will not get an awesome deal on this motherboard as these motherboards lack a number of features which are considered as basic to modern day computers. ------- I am myself working right now on a 2.1 Ghz sempron processor. I was shocked to see that my cpu scored only .31 on a benchmarking software called maxim cinebench.

I think the Nvidia has made the chipsets .There were some nice motherboards years ago made with Nvidia chipsets , I think there still are , the name code of nVidia chipstet is nForce .

I'm a bit confused, really. I didn't thought nVidia manufactures motherboards, I have always known them to manufacture VGA technology instead. But anyway, I think you have a bit of an old technology in your hand now, I don't think you would be able to sell that even around $150 (Mobo w/ processor). I suggest you just post it on swapping forums, swap it with something that you like. Maybe, you could get something with a much higher value than if you sell it instead.