Does anyone know where I can find cheap clip on hair extensions?

I prefer 14-18 inch under 40 bucks.I really want human hair but I know that's going to be expensive.Does anyone know where I can find cheap clip on hair extensions?
They sell them at my kiosks in my mall.Don't know about you.I buy colorful ones at Hot Topic for when I want to dress crazy.Does anyone know where I can find cheap clip on hair extensions?
Sallys beauty supplies... and 40 isnt going to happen. mine are 18in and they were 89.99 The shorted the cheaper though so maybe stick with 14in.

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