Default [Q] Screen Assembly

Does anyone know where you can get a LCD Digitizer replacement that doesn't cost a fortune. I see people on Craigslist that do it for cheaper then I can find a replacement for and was wondering if there is a special place that I can find one.
Currently Used - HTC One (ViperROM)

Retired Phones -
Samsung Galaxy S4 (Broken screen)
Xperia Play (Unlocked)
Samsung Captivate