Start with Young Projects in the Pacific Design Center. Paul Young specializes in showing video art but right now has a Christmas clearance of prints, DVD's, t-shirts as well as some unique pieces. I was tempted by Colin Roberts' surreal drawings and sculptures for less than $100. If you loved Marnie Weber's MOCA installation, Giggle of Clowns, as I did, you can buy one of her rare music CD's including her appearances with downtown LA's art/punk band the Party Boys. Also at the PDC, the See Line Gallery is having a moving sale offering many of their smaller works of work at reduced prices including architectural drawings by Eamon O'Kane.