6pm.com has pages and pages of boots on sale for under $50, from ankle to slouch to wellies to OTK. You're bound to find something you like with brands like Steve Madden, Kenneth Cole, Sam Edelman and more.
My Picks -
Nine West Zelipew $49.95, Madden Girl Rollins $32.97, Jessica Simpson Ciera $44, Sam Edelman Utah $49.95, and Paris Hilton Flipsy in Black $49.95
Also take 20% off at Old Navy with PromoCode: onsave20
20% off at Kohl's with PromoCode:foruonly