The best cheap one is at Walgreen's from the Jordana line, it comes in black and brown. When I bought it a month or so ago it was about $3, works really well. (I also recommend their rollup eyeliners- exactly the same as L'oreal).
If you can't find that, try Covergirl LineExact or L'Oreal Voluminous Marker. [ xokristabelle's advice column | Ask xokristabelle A Question ]
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