A great place to find affordable and unique art is on Etsy. You can search by location, budget, style, vintage or handmade, and many print artists have a variety of sizes they offer.
One local Los Angeles artist I enjoy is Mishel Valenton of Aeropagita. Valenton describes her work as “really focused on self awareness, positivity and enlightenment”, which she expresses well through her use of color and forms. The palettes have a cheerful Southern Californian vibe that would brighten and add texture to any room.