Infiniti by Conair Cord-Keeper Tourmaline Ionic Styler, Model 223XRB -
I have an older version of this one. It's currently $35 at Drugstore.com. Works fine for me.
My understanding from talking to hairdressers is that one of the reasons they spend a lot on a hair dryer is they use it all day and they wear out. I only wash my hair twice a week so a dryer lasts me years. I usually replace them before they wear out just to try something new.