Reccomendations on Graduated ND filters?

[Restomage]

I'm looking for a recommendation on where to buy a rectangular graduated neutral density filter. I'm looking to spend under $100, so I understand the quality I get won't be amazing, but any suggestions would be great. I'll be using this mainly for landscapes. Thanks all!

 

[MK3Brent]

Cokin filters are a hit-or-miss between "I like them" and "I don't like them."

I personally haven't had any problems with mine.

 

[tirediron]

Cokin have always worked well for me.

 

[Solarflare]

[...] I'll be using this mainly for landscapes. [...]

Hmm, is there any other use for those ? Thats exactly why I didnt bothered to get any: they are pretty much only useful if you want to photograph landscapes, and I'm not really that much into photographing landscapes.