Which lens would be the better choice: Sigma 24mm 2.8 AF or the Nikkor 35mm f/1.8 AF-S?

I'm looking to buy a new macro lens on Craigslist, preferably a 35mm for quality bokeh, and i saw an ad for the Sigma, which i have heard good things about. But i hate trying something new with my photography, only to be disappointed and out a couple hundred dollars!

Both lenses are on sale for about 170 dollars. And i'll be shooting mostly street photography, so plenty of sunlight, but also plenty of movement.

Is the Sigma lens really that much better? Is it worth my risk?

Neither of these are macro lenses, and the Sigma probably won't autofocus on a D3000/D5000 - series body.

Nikon makes a 40 mm, 60 mm, 85 mm, 105 mm and 200 mm macro lens. As you can see the Nikkor 35 mm is NOT a macro lens

The same is true with the 24 mm Sigma. NOT a macro lens.

The only macro lenses made by Sigma are a 60 mm, 70 mm, 105 mm, 150 mm and 180 mm

I'm surprised you have not visited the Nikon and Sigma websites to find out for yourself