Artnet.com is having an online urban art auction, which began July 7th and runs through July 23rd. The catalogue contains works by many of the major names in the scene, from the 80s through today, such as Dondi, Crash, Haring, Basquiat, Barry McGee, Banksy, Nick Walker, Faile and Shepard Fairey. There are also some strange, albeit nice, inclusions such as Mr. and Jim Houser, as well as some weaker urban choices, but on the whole this auction is definitely worth checking out as there is a good range of pieces in it.
It is also quite well-presented and easy to use; you can either scroll the catalogue page by page or search by artist. The biographical information is nice to have and I like the inclusion of sales results for comparable work – this is particularly handy if you are considering placing a bid.
I have highlighted a few of my personal favorites. Clicking on the image will take you to the lot.